Time to migrate? Well sure it is -- now!
Now that this asshole has publicized the exploit and wrapped it up in a package any half-assed script kiddie can screw somebody over with, sure. "Hey, MS-CHAPv2 is fucked" should be sufficient warning for any reasonably clued-in administrator to start moving anyone still on the protocol off of it, without the need to produce both software and hardware which are designed, manufactured, and promulgated expressly for the purpose of carrying out attacks on those who haven't yet migrated.