I hope it's another "OMG PANIC PANIC" rumor. I like HST rounds, and I'd think federal would be shooting themselves (pun intended) in the foot.
I can't find another source. Even the threads I've seen on XD Talk and Glocktalk reference the AR15.com threads as their source of intel
If all goes according to plan this 500 will give me 1000 HST rounds. That should hold me for a bit :-)