Microsoft VPN (IKEv2 with 4096 bit EC certs) from a corporate OC48 WAN to a residential 200 Mbps cable, all Cisco hardware LAN on both sides to MS Hyper-V server infrastructure. Throughput to the servers and encryption overhead is negligible, I agree, but browsing is slow. Could be QoS considerations, but I’ve experienced the same issues across a variety of VPN solutions, at least for 80/443.
Yeah, that's a possibility. Is it also possible you're getting packet fragmentation due to the encryption wrappers hitting some gear's MTU limit, resulting in multiple transport delays?