No, he didn't give a confirmed date. What he did was;
-predict every Monday (except the 4th of July), because those are the days VZW traditionally rolls out an update
-He was wrong the first 2 weeks, the 4th of July was the third week, then he was "right" on the 4th week, but wrong phone.
-He never claimed that the update was for the Incredible 2, even gave us the build number of the original Incredible (after we gave it to him)
It makes sense for him to predict 8/8 as the next update day. If it would be 8/1, the PDF would already be on the VZW website. The Incredible is one of the next phones in VZW's que, so 8/8 makes sense. If it doesn't land, he can make up a delay and predict the 15th or 22nd.
So, please don't get sucked in by this guy. He's not an insider and has refused every request to vet him.