A little slower than some, but not exceptionally. Mine just flowered, but haven't had time to prep the pix yet.

Then I wonder what's going on??? This is the only single banana that's not growing and they're all in the same spot with manure ammended soil and full sun.

I have had an occasional plant that just didn't thrive. Usually they will pup, and then die, and the pup will grow normally. Maybe a by-product of stress as a pup.