Honestly, one would think that the switch to a binary protocol and then to a different transport layer protocol would be justified by massive gains in performance...
I interpreted his comment as saying “where’s the 20% speed up” which seems like a more reasonable interpretation in context. A 20% speed up is actually quite substantial because that’s aggregate - it must mean there’s situations where it’s more as well as situations where it’s unchanged or worse (although unlikely to be worse under internet conditions).