So, for those in the know, is this a hummingbird moth?

I think not. You may Google on Hummingbird Moth and find lots of nice
pictures. See, for instance,
http://www.colostate.edu/Depts/CoopE...s/hummingb.htm

The moth's behavior is one reason for its name. You see a colorful blur
which dances from one blossom to the next, with the speed and grace of a
miniature hummingbird.

Daniel B. Martin