I don't think su3su2su1 made any claim involving donations split by EA-ness; wasn't it just that the median donation reported in the LW survey[1] (as a whole) was zero? (The underlying assumption presumably being that LW is a Wretched Hive of Scum and Effective Altruism, so that if LW users generally aren't generous then EAs must likewise not be generous.)
[1] Which LW survey? No idea, of course. It seems fairly clear that su3su2su1 was prioritizing for rhetorical effect over accurate analysis anyway.
I don't think su3su2su1 made any claim involving donations split by EA-ness
Of course he did. It's literally the first line of my post:
the median charitable donation for an EA in the Less Wrong survey was 0.
http://www.gwern.net/EA%20donations