Yes, they are.
LAPD has restarted classes, enabling recruits who were trained on Glocks to transition to S&W 3rd generation 45's. The classes are full, and many are making the transition.
The West Viginia State Police were supposed to get brand new Melonited 4566TSW's - but that is now in doubt. No matter, they won't accept the M&P in any case.
Of course the CHP is still recieving the integral rail 4006TSW's.
There are several agencies locally who are sticking with 3rd generation 45's as well.
I'll retire in twelve years with a S&W 4506-1/4566/4516-3 in my holster.
Regards 18DAI.