Nothing official.
Main thing I've heard is that the number of Revit seats is more than doubling every year. With the announcement of it breaking 100k, that seems on par from what I heard a year ago, and before than, on seat count.
As for usage, it's really taking off. At AU last year there were hundreds of folks in my two Revit classes, and hundreds at the Revit mixer party thing. Contrast that to three or four years ago (AU 2002) , when I was one of probably 20 real revit users present... When I was still doing Revit consulting work I'd get a call a week, most of the time two, from folks needing Revit help. And that's just within the Bay Area. It's pretty crazy. I always thought that Revit was a cool tool, but never thought it would grow to what it has today (but I started with it pre-Autodesk, so that adds a lot to that notion).
But in the end, it's not a race of ADT vs. Revit, and this whole notion of whichever sells more seats 'beating' the other one is a strawman made up by the ADT folks to convince themselves of something. I'm not certain what. You don't see the Mechanical Desktop guys saying that Inventor is gonna 'die' just because Autodesk sells more AutoCAD & AutoCAD LT than Inventor...
Jeffrey
