I did some R&D work with a former Delta Operator who swore by Glock for two reasons. One, it was reliable with whatever he could find, and two, he could throw it out of the bus window while getting out of Dodge without regrets.
I don't know what he would have thought of the XD, he bought the farm in Iraq in '04.
I agree with his thinking. The protagonist in my new book carries a Glock for those very reasons. And after you throw one out the bus window (or overboard) you can get one just like it anywhere, anytime just about.