I'm a big GK fan too. I actually like the fact that they have early leaks like they do. It helps retain interest. I also like that they (usually) make sure their product is up to snuff before releasing it. They probably would've lost a lot of users if they had released the Fusion a year ago and have it crap out.
Early leaks are fine say 6 months. But the Fusion was announced over 1.5 years ago. IMO that's more than a little long for a leak. Once again, IMO, if a company announces (and to me the 550 was an announcement, not a leak) a product it should be out no later than maybe 6 months after it's announcement. With the Fusion is seemed like once they announced it then GK started the actual design and engineering. It has been too long and now I think that some of GK's credibility has suffered as a result of the long period of time between announcement and release. I am glad GK wants to get the Fusion right before releasing it but at this point I am not sure if there is a straight answer as to when the 550 will actually be released. Frustrating.
