This is true for EVERY phone maker - for the past 5 years or so, since so many features are mandatory in a high end phone. Every single one...
I have had them all. Nobody is ever pleased with the release of a new line and/or new OS - no matter who makes it. Features are missing, promised features work poorly, bugs, slowdowns, reboots, and the works...

My personal experience to support this:
First iphone, first blackberry bold, samsung omnia HD, P990, HTC Touch Diamond, blackberry storm, Android G1,


My personal conclusion: It is economically impossible to release a properly tested and stable new iteration of any mobile OS.

Buy a 2nd or 3rd generation and get a stable but un-exciting phone, or buy the first generation and have it crash, hung, and burn.