Haven't seen them, but we've passed the degree days for their emergence.

3 weeks ago, in Grand Rapids MI - not that far from you, although we're on the other side of the lake. I've been picking eggs off every four days and just killed my first larvae yesterday.

I saw one last week, haven't found any eggs yet (though I did find squash bug eggs and a pair).

yesterday and today just south of Boston.

No eggs so far. But I plant mostly resistant varieties.

I did see a moth around the squash earlier today and thought it was a confused cabbage worm moth, then read the very informative thread below that had photos, etc. Will be watching for eggs now!