So, Runic Echoes?
http://champion.gg/champion/Udyr/Jungle
http://champion.gg/champion/FiddleSticks
http://champion.gg/champion/Fizz/Jungle
http://champion.gg/champion/Elise
http://champion.gg/champion/Evelynn
http://champion.gg/champion/Nidalee
Huh, would you look at that! Almost every squishy (or bruiser) AP Jungler that CAN abuse AP stats along with MS is doing... just that!
And what would you know, the one out of this list that synergizes EXTREMELY well with MS is... benefiting from the MS! Wowzers!
Seriously though, almost every AP Jungler saw a winrate improvement with the release of Runic Echoes, the main benefit being the AP and ganking power to those who couldn't weave in autos.
Side note, most AP junglers were also Shit-Tier before Echoes.
Whaddaya know, the one champion who WASN'T shit tier before Echoes, and who benefits explicitely from BOTH stats available has an exponentially high winrate!
Sure, MS is nice on all champions, but it solves one of few problems Udyr had. Lower the MS on Runic Echoes, and watch his winrate drop.