Has she tried it? We have an '09 TDI Sportwagen. We fit out Lab, 2 kids in carseats, and all our junk for short trips in it (with our Yakima roof box). It's a BIG little car. 42 MPG hwy in our experience with the AC on and fully loaded. 30+ city MPG. Doesn't smell diesely, starts right up in the cold, DSG is plenty of fun for me (I like manuals), no mechanical issues, 10k mi oil changes, 500 mi between fill ups, should hold its value better than anything out there. We found ours used by telling the dealer we wanted one and waiting.
I think the manufacturers will wake up eventually. Wagons are the most practical cars out there.
I could not have asked for a better car. TDI Sportwagen FTW.