You're probably kiddin' me ? Show me scans who shows Tsunade faster than Ay... The only ones faster than A in base excepts Naruto, Sasuke Madara, Obito etc are Mianto and maybe Tobirama...
So what ? I already said Tsunade was complimented because of her strenght and Ay because of his speed, the fact that she tanked Ay's attacks don't prove anything. Plus Ay strenght combined with with his speed >> Tsunade strenght > Ay strenght without speed.
It takes less a second to activate his lightning cloak, dude. And he doesn't need to activate his V2 to speed blitzes her...