I haven't seen anything official, but I sure could speculate.
HTC recently announced that they have shipped over 3 million Evo 4Gs. This was in part due to aggressive advertising from Sprint, and the fact that they had no real competition. The Epic looked like a competitor, but the ongoing lack of Android 2.2 isa liability.
The Incredible, in comparison, has had bigger component shortages as well as tons of competition from Verizon's own Droid stable. Typically when a product like this breaks 1 million in sales/shipped volume, that gets announced. The fact that HTC announced that their MyTouch 4G has already sohipped over 500k units is telling.
I'd say the Incredible did well, but hasn't broken 1 million units yet. Pure speculation on my part though.