FWIW...

I'm on this route coming up in a few months and I've been watching which aircraft they use. Seems that the aircraft changes VERY frequently for the morning flight ATL-SFO DL 2049....at least in the last 2 weeks. I've seen 757, 767 and A330. Day of week doesn't seem to matter either. The two months or so prior it was always a 767. Odd...