For those of us who are used to the XD platform (including the Mod 2), it might come as a surprise that on a XDs, you CAN rack the slide without depressing the backstrap safety.
I just discovered this and was so surprised that I called Springfield to verify that this is normal function for an XDs. They assured me that it is.
Of course, if you have a regular XD or XD Mod 2, the slide should NOT move significantly unless the backstrap safety is depressed.
