It's impossible to say. 22+, may mean the group cruises around 22-23mph. It also may mean, we average 22mph or better, and often get going in the high 20's or low 30's.

Those are two very different things.

It also may be a group that goes a pretty steady 23 mph, or it may be a group that has constant surges and attacks.

And there may be hills, and if there are hills, it may be a group that waits for everyone at the top, or at least does a rolling regroup, or it may be a group that eats its young.

The fitness and skill required will vary greatly depending on where this ride fits into the above referenced continuim.

As said above only one way to find out.