DAMN IT! The god damned thing is back. Saw some shoots sprout in the lawn as we were getting ready to mow the lawn. With all of the roots we dug out last year, I almost have wood to burn for 1 week straight. Damn tree was so entrenched and sprouting from everywhere. This weekend, I plucked out 5 new shoots, 1 of them connected to a huge root that I must have missed. I dug out like 6 feet of it before I was forced to chop the rest of it that headed further underground.
On a happier note, since it has taken this long, mid-may, for the thing to make its first appearance, I figure there was minimal stored energy in the root system for it to have sprouted at the same time as the other trees, hence the delayed sprouting. Hope I'm correct and this thing is on its way out.