I like this idea. We need to talk more as humans in business.
One of the persons who made the offer knew my previous salary (close to the new offer). And I negotiated with him before.
Furthermore he knows exactly what the market rate is, as he dealt with it on a daily basis.
That theory (they didn't know..) is debunked. They even mentioned Angel List saying "in the valley they pay 80-140k", which is strange because that fact undercuts their own argument (though they said that equity was much lower.. )