I can believe that. Things have been a little weird the last four or five years with the weather, summer and winter temps, etc. I see a very small indicator of change in my hummingbirds. You would think such a tiny creature would be far more sensitive to minor changes which are too small for us to really notice. For all of the time I have lived on this place, I had five or six hummers arrive in late March just like clockwork. Year after year, for maybe 30 years. Never had them winter over; they always left before Fall. But starting about five years ago, suddenly I had at least 25 to 30! Maybe more because it is impossible to count them when there are that many. And they started coming weeks early, even in late January while it was still cold and rainy. And it has continued since then. Several started staying all winter, whch never happened before in my yard for decades. About February now I hang out two of the large size feeders. When the whole gang arrives by late March and start hitting these, they will empty these two big feeders every single day. That is a lot of sugar! I have a youTube of the little rascals swarming. The video shows just one of the two feeders and there are over a dozen hitting it, as well as the air is full of them out of camera range and there is an comparable number hitting the other feeder. Clearly something is driving them up here in far greater numbers. Here is the video: