I had the opportunity to ride a 900T a couple of years ago for a little bit, which was my first time on one. At first it is very different from the traditional throttle that takes some adjustment, but than it was fine once that period had passed and no complaints.
I think many people just like to complain and the guys on ST are expected to be super critical of things, that is really what there job is, so not surprised that it is a point on the con list, but again, if you ride it for any period, that different feeling or odd characteristics, goes away and becomes just normal.
When I jumped back on my 2-stroke with a "normal throttle", I know that I did not have some great sense of relief.....but to each their own.