Not only is GT Grenough so sure his failed "Pentocost" (Shavuot) 2008 rapture date is correct, now that it has failed he has made a "discovery" that Shavuot is not really until august. Some false prophets continue to grasp at straws after their prophecies fail. (Another false prophet who claimed the rapture would happen in 2007 changed it to orthodox new years on january 1st after her 2007 rapture date failed - and is now touting 2008 as the year) It is interesting to note that august is the wiccan harvest festival and many false prophets are now claiming Shavuot is the same as the pagan harvest festival. That should tell you something.
This is what GT Grenough stated:
"It points to early August 2008. I don't see how there can be any other conclusion. This is filtered and evaluated data. It's a prototype that's been years in the making, and as engineers often know, after a while a prototype becomes the real thing."
What he forgets is that the Titanic was also a prototype. G-d will not hold to the false prophets dates no matter what they "conclude"
And in another post he makes it clear he is giving a rapture date:
"I’ve put together an analysis – a prototype which has been a work in progress for months, a 20-page report via a PDF file which I’ve now titled “BEYOND FAIL SAFE” which indicates beyond every reasonable shadow of a doubt that August, probably early August 2008, is the TIMING OF THE DISAPPEARANCE OF THE CHURCH – THE RAPTURE."