Well, The Washington Post (yeah I know - lots of credibility ... NOT) says so. Actually, they quoted Thompson advisor Mary Matalin (who IS credible) as saying this:

"He has made up his mind," she said. "And one can appreciate that planning the announcement of what's on his mind needs to take place in a deliberative fashion."

I'm not sure about the strategy. It seems to me waiting until September may not be the best idea. Still, Matalin and Thompson, et. al. are more experienced in campaign matters than I.

Let's hope they're right.

RWR