Thanks! It's getting late here (3 AM) so this might not be the best wording, but would it help if I added a note after the third paragraph along the lines of "Note that there have been previous side channel attacks which depended on how microarchitectural features (usually caches) affected code execution; but my work was the first to demonstrate information leaking from a program into the microarchitectural state and then being extracted from there." ?

(Feel free to suggest other wording too -- as I said, it's getting late here and my word-putting-together skills are currently subpar.)