I think what we're seeing is just a VERY VERY bad example of IPS with this particular panel from AUO. It really is inferior in almost every way to what IPS should be, apart from the 144Hz aspect of course. The quality of some examples I've seen is really shocking, often just in uniformity alone... in 2016 it's really shameful, but I think AUO ignored everything that makes IPS so great and focused on pure speed, realising that the mere fact it was IPS would be a great marketing hook... but in reality it doesn't come close to the high standards of what IPS is capable of. Which is a crying shame really, because for many people it will be their first IPS monitor, having heard all these great things, but then they get this heap of junk! IPS deserves so much better, because it really IS! You may be right though, the Dell is a very good TN monitor by most accounts... only people who've been used to quality IPS for years seem to have an issue, and for professional colour use I certainly don't think it's the right choice, but for gaming it probably is the best monitor out there right now, and at a good price. Unless you do somehow win the AUO lottery and get one of those gold dust panels!