Wow, talk about a straight answer.  I recently wrote GMAC and asked them:

Hi, Are you planning to release data for Quicken?  Thanks, Freedumb

And received the following response:

Thank you for contacting GMAC Bank. GMAC Bank will not be offering the Quicken functionality. In order to be compliant with the Intuit packaging, our current infrastructure would require change that is simply prohibitive from a cost benefit analysis. Have a nice day.

xxxxxxxx, GMAC Bank Customer Care

I like straight answers, but wow.  That was as honest as it comes.  Anyway, if you’re considering GMAC, note that they do not have Quicken transaction data.