nope. with lets say...

mythical sword if you have 60% ias your zeal swings rate are (out of 25 in a second)
8/4/4/4/4 (first swing being 8/25ths of a second the rest being 4/25ths of a second)
so a full zeal swing would be 24/25th of a second (96/100th's)

and if you have 300% ias on a mythical sword you would still be 8/4/4/4/4 zeal frame

smite can attain 6 frame and nothing faster.
vengeance and any other non multi hit/smite skills are 8 frame max (same as max speed for first hit with zeal)

if you want me to explain any more detailed ask.