We’ve been wondering what’s been taking AT&T so long to add the HTC Touch Pro2; after all, Sprint, T-Mobile and Verizon Wireless have already leaped aboard the TP2 train, and AT&T has long been a leader in Windows Mobile offerings.  So what gives?

Today we think we have our answer:

The AT&T version of the HTC Touch Pro2, the AT&T Tilt 2, will ship with Windows Mobile 6.5 pre-installed on October 6. 

This information comes from BGR, a site known for many things — frequently incorrect product release information not being one of them.  According to BGR’s source (their “ninja”), the Tilt 2 will be released on the same day as the official launch of the Windows Mobile 6.5 OS.  Hmmm… And with photos (like the one above) showing WM6.5 running on the handset being posted, we think it’s a safe bet that AT&T made a decision to delay its Touch Pro2 release in order to forego that whole end-user 6.5 upgrade thing.