You seem to be missing some basic facts.

Facts:

1. Google released the source to ics in November 2011. At this point Google is done with developing software for your phone (excepting updates, as below)
   1. The most recent ics is 4.0.4, this update came in march 2012. (4.0.3 was Dec 2011)
2. HTC built the heir apparent release (3.14.605.10) on Jun 20th
3. Verizon has had it in "testing" for qa ever since.

is it possible vzw sent it back to HTC at some point for a rework? of course it is.

• ESP since there is another build floating around.

Regardless... Google has had zilch to do with the delay. Since, as above, they've been done with development since 2011 (3.14.605.10 is based on 4.0.3)

If it is the case that the new build (*.12) is the ota, blame is on HTC and vzw.

If it is the case that the June 20th build is the ota unchanged, blame rests only with vzw. (well, short-term blame; HTC would still have a share of blame till Jun 20th)