Well..........this may be a more concrete guide to release dates:
# For Eclair project build pro - HTC Incredible - 5wwrQyTz - Pastebin.com is an Eclair project [Android v2.1] build that was made on 24 March. In the build comments is the line [# For FOTA bug report].
This is obviously a VZW build of Android. Lets assume that its the final release candidate build that is approved by VZW. If this is the case, then there is going to be some delay for that build to get into production and be loaded on the ADR6300 units being shipped from HTC. Its possible that its a post-release update, but unlikely.
On this basis, the timeline from build to production load to shipment in quantity is likely to be a couple of weeks at least. I'm guessing that any ADR6300 units in circulation are loaded with an earlier build. These are probably the watermarked versions we've seen in pics. All this suggests that it might be mid-late April earliest before stocks loaded with the 24 March build are in the stores.
This build may be a red herring, but for lack of better intel I'm taking it on face value.
Here's the top of the build text:
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