I know most of the guys I know around here that like Michelin have not switched yet, they use M12 front with S12 rear.
September Dirt Rider Mag, did a tire buyers guide and they said while the M12 front is a good tire but it tucks under to easily for most of their rider's tastes.
They said the Starcross was better and their riders were mixed on which of the two, MS2 or MH2, they liked better on intermediate terrain. They also said that the MS2, like the Dunlop D756, is a true intermediate tire and doesn't work as well when the ground had a hard base under softer soil.