I had the similar problem with my HTC Desire Z for a long time: navigating to home screen might take up to 40 seconds! I have tried a lot of things, but nothing helped. Uninstalling of Google+ application fixed the problem completely.
I had the problem with the same symptoms on my HTC Desire Z. I have tried a lot of things for about 2 months, nothing helped. Finally I have uninstalled Google+ application (it was related to another problem I had), and it helped.
Hi.I had the same problem. As a fix I have uninstalled Google+ application. That also fixed another problem that I could not fix for last 2 months: slow navigation to home screen.