Fast moves +10 issue

If you look at almost any pokemon, it's fast move has a +10 next to it. It's as if it was weather buffed, except it's everyone, all the time.

I expect this is making PvP battles very short, and making the faster moves much more damaging. In particular, Magikarp and Slaking are doing +10 with Splash and Yawn.

I doubt this is permanent, but it's kind of weird. Comments?