There's no real "normal" pull length (as far as I've found with varying groups) but 10 minutes is deffo too long in a fast bunch! Mostly it's kept to a 1-2 minutes, but can be far less or literally a few seconds if we're rolling turns.

It will also vary with each rider in the bunch, how your bunch rotates, and how strong everyone is feeling. No need for you to pull as long as the guy in front did, you pull to maintain pace. When I'm fatigued my turns on the front are shorter. If the bunch is strong and I'm not feeling it, my turn may be 10 seconds. When I'm feeling strong (or stronger than the others) my time on the front is far longer. A 10-minute pull on the front would only occur for me on a social ride where I'm sheltering some not-so-strong riders.

Let us know how you get on when you discuss with your particular group. Worth doing for sure. 🙂