This has been going on for quite a while now, bridge has been very slow opening anything.
Well, I found out why last night. I use Symantec antivirus as I get it free from where I work, and I think this all started after moving to v11 two years ago.
The other day I read something about making image file extensions exempt in your antivirus software, so I made NEF, PSD, PSB, TIFF, file extensions exempt.
Fired up bridge and low and behold, now it works like it use to. Before it was taking 30 to 60 seconds just open a single folder, and even longer to make high quality thumbnails, it would just freeze. Now it takes 1 second to do the same thing. I can't believe its taken me this long to figure this out