If you read Srajan's review, you would have seen that he suggested that very inefficient speakers like yours (83db) would sound better, because they would not have to run loud before surpassing the 2D flat sound threshold.
Unless you listen very low, you would not notice anything, while 90db speakers would have to be played quite loudly to be above the same threshold, which he surmised might be due to truncation.
Of course, it is possible that he got a lemon to review as well.