Twitter should use some sort of verification of domains that the users are using with there profiles, there is no guaranty that its from Google itself. !!
Not to hijack your thread but I thought I would share this with everyone. I had my adsense account banned awhile back for using traffic exchanges for one of my websites, guess who else uses them.
Traffic exchanged when used not wise may kill your ranks. I suggest just linking with other sites and commenting instead of doing such stuff.
I'm pretty sure it is BullSh!t! If it was real they would already have thousands of followers from inside google alone, this guys don't ever have Matt Cutts following them.