I assume that's total, including apps? Or are you saying that between old, mobile web and new, 75% of hits are from new? If so that's quite different from my traffic stats, copying a comment from older thread:

According to my traffic stats (moderating ~400k subscribers), old + mobile web frontends make up about twice the traffic of new frontend. Apps are by far the most popular, about ~3x of all web frontends combined.

I would expect people that contribute to have a higher old.r percentage, and smaller subreddits as well. (Frankly I expect this to go with age, everybody above 17 must ude old.r in my Imagination). Do you have any insight on this?

I'm surprised the percentage is that high, although I'd imagine it would vary a lot depending on the sub

Problem is newcomers don't know about old, and will eventually push down that 1/4 over time