My 22+ group is horrible. All young guys. Racers. It's a very loose and chatty 16-18mph for 20 miles, then 40 miles at 22+, with very, very hard attacks on every hill, fast descents into strung out 25mph+ pacelines that last for 10 minutes and then back down to cruising at 20 and then smashing up a hill and repeat that 15 times, and you get back and your average for 55-60 miles is 21.3mph and yet it feels like you just were putting out so much more effort.

I can only hang with those guys for the easy part and then maybe 8-10 miles of the 22mph+ pace with the attacking, then I ride 20-30 solo "junk" miles and that's my group ride now.

Where I used to live it was pancake flat and I rode with old folks and I was the World Champion and if we road a 21.3mph average it was like nothing because it was just a nice strong ride down the road among friends.

Depends what your group is like. But the question definitely can't be answered in an internet forum, homie!!!