I don't think TW is disputing that. Indeed, their last reply seems to have reaffirmed their understanding of diminishing returns in most practical applications. ^^ My only real concern with the kali's as far as frequency response goes, is that dip from 8-12KHz, and the difficulty in finding a succinct answer to just how far off axis I can listen in order to flatten that out. In this review, Erin suggests 10-20 degrees, and IMO, looking at the data, it seems like placing these monitors horizontally and gently toeing them out a few degrees would actually perform quite well... However, in the IN-5 review, he suggests moving off axis won't really help. The speakers are nearly identical so I'm not sure why that advice would be different between the two.
There's actually a video on youtube of a music producer "Warren Huart" comparing these kali's directly to his genelec monitors and he seems quite happy with them (but he's a super laid back guy anyway

Think he'd be happy to try mixing on a toaster oven if the music was good~ )