Funny with the first batch of responses you were willing to get another phone. Then as soon as a few people came and said they had an issue, and btw not all of them seem to have the exact same issue you were having then its " aha, I knew there was a problem with this phone." And none of them that I saw said they attempted a Factory Data Reset like you did.
Just get a replacement for the phone or if you're still in your 30 day period get another phone. I have a D2 and I don't have that issue.
I actually am waiting to get the HTC Merge and have been waiting it out to see if it will be released but looks like it really isn't going to come out anymore so I think I really will return it before the 30 days is up. The bugs on this phone isn't imaginary it's a problem with the Manufacturer. Not only this GPS thing which isn't that big a deal because when it works it stays working for a while, but it's the corporate email sync that's rediculous especially for a phone marketed for the global corporate email user.
I'm not at all saying your issues are imaginary. I think they are real. But you can't declare it as a bug when others don't have this issue. If you get a replacement and it happens again Then you might have an issue. You certainly did the proper fixes for it.