I believe I get to downplay that because the federation they joined helped grow their own network Do you have any evidence that federation helped Google grow t

I believe I get to downplay that because the federation they joined helped grow their own network Do you have any evidence that federation helped Google grow the network in a significant way? allowed them to do Google Talk for other domains Are you referring to Google Talk integration with Google Apps For Your Domain? Outside evidence suggests that federation is not used between these domains. For example XMPP SRV records are not required and ignored if present.