Thrawn,
There were a few incidents where 25mm DU fire from Bradleys knocked out Iraqi tanks in the recent war. In fact, I believe they were from the 3/7 infantry, and one killed THREE T-72s while the other got TWO, without loss. Think about it. Its firing a round just slightly smaller than that of the A-10, which was designed to kill tanks from the outset.
This incident happened on the outskirts of Baghdad in early April (not sure the exact date and will look up the news reports). I'm going to have to go back and look up the exact reports, but I did confirm it through at least two sources as being authentic.
As far as a T-62 taking out 2 Abrams in Desert Storm, I hadn't heard that one. Has anyone else? I know we lost 2 Abrams in 91 but both were returned to service.
Just my $.02