i'm w/you on this, adam. i also believe that there are differences in cabling. personally, i have found there to be more differences in speaker cabling than power cords, or ic's, but i do believe that these differences exist. what you related below reinforces what i believe - that
all high priced cables are a complete waste of money, unless, of course, you are buying them for reasons other than the sound of your system. which is ok, if that's what makes you happy.

this is also why i prewiously wrote that it's not the top of the heap cables that are over-priced, but only the over-priced cables that are over-priced. cables make a difference, but you do not need to spend a lot of money to hear the difference. and, i think it's the fact that there
are such obscenely overpriced cables out there that offends many folks' sensibilities about cabling, & cause them to become so irate about it, &/or write stuff like that mcintosh article prewiously referenced. me, personally, i do not take offense to it at all - i think it's funny as all get-out that otherwise normal people will shell out so much money on wire. i am the first one to show the ridiculously priced cabling to my friends, & we always get a good laugh out of it!

of course, what's over-priced is a relative term. my i/c cable of choice, the alphacore tq2-ag, retails for $186/meter pair. being the cheapskate that i am, tho, i have waited until i found them f/s used, & have gotten them at 50% off, or more. my non-audiophile buds think i am insane to spend that much on a pair of ic's.

i am happy w/them because i find them to be extremely neutral, & a coupla folks i know who are into ridiculously priced cabling (imo), have also found them to be neutral. that's what
i want in a cable - one that does
nothing.
mebbe i am close-minded, but i really do not care about trying to improve on my i/c's. i have only one run of cabling that i would consider replacing; it's a 6m run that goes from my preamp to my x-over, but until i stumble across a used pair of tq2-ag at >50% off, i will be content w/my old trusty tara labs quantum iv at that last spot... re: power cords, i am happy with the ones i have that aare similar to the diycable stuff. i admit to being interested in trying a couple other speaker cables than what i am presently using, but none of it is ridiculously priced - the most expensive i have thought about is the analysis plus silver oval 9.... (and, yes - i would not be offended by any spam from any vendors, who think their reasonably priced speaker cable will smoke the a/p silver oval 9...

)
ymmv,
doug s.
Why does it seem that most of the heat regarding topics like this come from the 'I can hear a difference with my $$major cash outlay$$' camp? That's interesting.
Ban cable topics? People serious? Let's be strict about tone and attacks, of course, but censoring a central topic would be a little extreme and ridiculous no? It's a slippery slope, censorship. What's next? CD VS record? SS VS Tube? What kind of reputation would AC get if it's the only forum where 'Cables' are next to 'Religion' on the verboten list? 
A while back i was involved with an audio shootout of various things, in a $1M room. Yep that's right, $1M. The room was especially designed with no right angles, hung from above by dampened cables, triple double pane non parallel glass windows, hand crafted maple diffusers on the back wall, etc. Utter ridiculousness!
Anyways, interconnects were part of the show and know what IC tied for first place? a DIY $28 one. Honest to god. What was it?! 2 extra long SCUSI cables from old printers, 68 pins of 28AWG OFC copper with foil then braided wire shielding. Half wired hot, half cold, good RCA ends, shields wired to one end which was pointing forward in the current flow - source side, not amp side.

I'll be honest, i didn't hear much of a difference, but it wasn't my room. Nobody heard much of a difference, and judging was hard.
The golden ears types which were there, were mostly surprised by the price/performance aspect. There were cables present which i've never even heard of, running neck and neck with old printer cables! Everyone got a kick out of that.
Hit up your used computer store, get some old SCUSI cables, make some bloody fine interconnects... you know, if you're a DIY type.
Only drawback is they're not as pretty as Steve's cables, which are very handsome indeed 
/A