modern website UI roundtrip latency (from user input event requesting new page to output finish of its fetching/rendering): anywhere from 2000 to 15000 ms, with p90 of say 4000 ms
BBS (equiv UX): anywhere from 15 ms to 1000 ms, with p90 of say 100 ms
"SECOND ONE, PLEASE, AND THANK YOU!"
(yes, anecdotal, but typical for me recently)