Okay, jumbo is over $625k. I wasn't sure if super-jumbo was something else!
It's possible, yes, but it depends on things like your credit and exactly how much less than 20% you want to put down (i.e., 5% versus 15%+). We were approved for less than 20% down (about 15%) on a two-trust loan...one would be for the $625k at a decent rate, and the second loan is for the difference between what we could put down and the remainder of the outstanding price. That trust was at a higher rate, of course.