When we're talking about the "time-frame" thing, it's not that I will flat-out lose interest in the line (I love Toy Story, and regarding merchandise, this line is the best thing that happened to the franchise), it's just that I'd prefer the toys to come sooner rather than later, which probably goes without saying.
I agree that the fan hype hasn't helped, and I can admit to getting hyped about this line perhaps too much - Thinkway were probably not even planning on making Zurg or Stinky Pete, and may still not be now. I know fans on other boards were hoping for characters like Rocky, Snake and Robot, which was probably too much.