We're a pretty small country and some ISPs insist on using PPPoE.
My main ISP do not: I'm fully routed from the exchange onwards and would see very low latency to someone connected to the same OLT. This is uncommon: even Sky and TalkTalk are more likely to have a switch in the exchange to connect to Openreach and a router at the end of a chain of many exchanges.
I think that was how Digital Region used to work, my latency to a friend on the same cabinet as me was insanely low, almost LAN latency.
It was a real downgrade moving to Openreach from that. Though I can't really complain now, rebooted my router earlier and came back up at 6ms to Zen. For some reason it had been a lot higher lately.
Something seems to have changed, that's the best downstream speedtest I've had so far since being on FTTP: