"Post grunge" in my opinion is crap. It's artists like Nickleback, 3 Door Down, Puddle of Mudd, etc etc.
I'm a huge fan of grunge music (or better yet that era of rock music because few of the bands that got labeled grunge really were grunge) and "post grunge" isn't even near the same type of stuff. It's more or less watered down rock for the industry aka a easy sell.