This is sort of what the YC Fellowship sought to address, or at least addressed ...

DanFeldman on Oct 9, 2015 | parent | context | favorite | on: I am Sam Altman, President of Y Combinator – AMA

This is sort of what the YC Fellowship sought to address, or at least addressed as a byproduct. There's a few companies in the current batch from the midwest/east coast at the 'early development' stage who moved to the bay. If YC can scale YCF up, it should help.