Very nice!

I doubt however that many people with fast, modern x86 computers will notice much difference *in practice* (unless for sites that is severely overloaded with über-heavy JS), but since it's there, it should of course be used!
Should get benchmark numbers up quite a bit...

Take the engine and build an amazing GUI around it and you have it.
Yeah I agree, but it's quite a bit more than "a GUI", he has during the last couple of years built *a complete application* around the webkit engine.
IMO, Odyssey defines how an Amiga browser should be; a lot like Ibrowse, all native GUI, all tools and managers you could wish for, supporting the very latest web standards, great flexibility when it comes to settings, spoofing, etc. It's just great!
