Just after Labor Day is the traditional time to announce for the Presidency. Fred Thompson is right on time. A better question to ask would be why every other Republican candidate was buffaloed into declaring on Hillary!'s time-table.
There is plenty of time for Fred Thompson to kick butt between now and January.
Actually, it was empty-suit Obama who announced first. Hillary wasn't going to announce as early as she did - he just jumped the gun and pretty much forced her into announcing before he sewed up the money and the support - the "rock star" (I hate that term) treatment that he was getting threw her into a panic.
If I were Obama, I wouldn't be going for any walks in Fort Marcy Park...