Wouldn't say "many" is an accurate term here, from an observational point of view...
On this forum - Prev, Davek, Zatara and about 2 others who pop in/out every so often vs. Everyone else, and I'm not even sure if Prev's not a WUM at this point and Dave doesn't have actual mental problems.
On the Bulgarian Everton platforms - 0 Martinez supporters now vs. everyone else, especially after the West Ham game (which made me, similar to Khal there, get out of Bobby's corner as well), where there were 10-15+ of us (out of close to 100 people in the FB group), but that was the last straw for everyone... then Arsenal just put fuel in the fire. And as far as facebook itself goes, any of the Everton groups have nearly no one still in support, and even those who are are close to wanting him gone, or want him gone after the season ends.
The poll on this thread was 60/40 or so a few days before West Ham, then close to 50/50, now it's 30% for in and ~70% out...
I know most won't be match goers and all, but they are still Evertonians, and the opinion doesn't change like.