I don't know man, he didn't change all that much if you ask me. He also couldve taken the extra "few hours" to make something that actually looks different before releasing it if you ask me.
If Svbtle's design is that great and reaches any level of popularity, you'll see tons of mimics pop up, and Dustin's so-called vision won't happen anyways.
Where did Nate mock Dustin, or even speak negatively about him? Reading his post I find only one mildly negative comment:
"I felt Dustin missed out on what have been a great open source contribution."