Android 1.6 getting pushed to G1s starting tonight, myTouch 3Gs in a day?

This is totally out of left field, but TmoNews (which tends to have a pretty solid track record when it comes to all things T-Mobile) is claiming that "select" G1s will be receiving Android 1.6 "Donut" starting... well, right about now. So much for any lingering worries that the first retail Android device was being left high and dry, eh? If everything goes well, the rumor goes on to say that myTouch 3Gs would be getting their own over-the-air upgrade in about 24 hours -- and like the 1.5 update before it, it'd likely be a staggered rollout to make sure that T-Mobile doesn't brick a bazillion phones in one fell swoop. Any G1 owners out there seeing anything yet? This sounds awfully quick, especially considering that the Dev Phone 1 just took delivery of 1.6 a handful of hours ago -- but hey, if it's true, we like T-Mobile's hustle.