I thought IPS Glow was the tendency of contrast to reduce when viewed sideways (or at the edges of the screen)? While TN screens don't tend to suffer that specific problem they're much worse when it comes to distortion at the edges and from an angle generally. This would be the classic test:
http://www.lagom.nl/lcd-test/viewing...p#angle_purple
On a TN it's very hard to see as anything other than a gradient because of the top/bottom distortion instead of the solid single colour it is (see depiction at the bottom of the page if you don't have a TN screen).
Generally though all LCD flaws (including ghosting, 'low response times') are fairly under control these days and it comes down to what you personally notice as to which you need to prioritise. Personally I really struggle to see ghosting but TN top to bottom contrast change can really annoy me in some games (dim cave systems and other low contrast images are the worst).