Frank Rich advises Romney against trying to wait it out:
What Mitt doesn’t seem to realize is that whatever embarrassments are in his tax returns, the bigger problem is that his secrecy keeps accentuating all the mysteries in his resume: the erased hard drives he left behind when leaving office as Massachusetts governor; what exactly he did as a longtime lay official in the Mormon church; and, of course, what exactly he did and didn’t do at Bain and, for that matter, when he was there and not there. If he keeps trying to wait out the tax storm, it will keep growing — hitting a new peak when he finally releases the one additional year of tax returns he has agreed to disclose, and another when his veep pick is asked to release his or her tax returns.
Ryan Grim points out that the candidate hasn't even fully released his 2010 returns:
Romney released his 2010 tax return in January of this year, a document that first informed voters about the existence of his Swiss bank account and financial activities in Bermuda and the Cayman Islands. But people who own foreign bank accounts are required to file a separate document with the IRS that provides additional details on such overseas bank holdings, and Romney has not released that form to the public.
Kornacki wonders whether Mitt is simply biding his time:
Maybe the calendar offers a clue about Romney’s thinking. In just over a week, the London Olympics will kick off. If you’re going to release more embarrassing tax returns, maybe that would be the ideal time?
The Dish 