I don't think Twitter and facebook have allowed people to communicate across social/educational/economical boundaries. Yes you do get an odd an interaction here and there, but by and large both these platforms have become giant echo chambers where you only hear echoes of voices and opinions like your own.

Honest question, do you think an average internet user, interacts with and actually enagages in an intellectually honest way with people outside their own educational/social strata on any sort of regular basis?