I hear what your are saying...It sounds similar to the Back and Forth melody, albeit played on an acoustic piano as opposed to the Wurly Electric. Then the electronic drum beat kicks in. Is this the commercial you are referring to?
yea! Very similar to B&F, as you said, with some different instruments.
I heard it one morning and it stuck in my head/sounded so familar/but couldn't place it and I got in my car later and listened to a gig and the first song was B&F. mystery solved