Wikipedia vs Britannica tested

In Wikipedia vs. Britannica Smackdown, Ed Felten takes my challenge. In the meanwhile, I’d done some hypothesizing, here.
So how’d I do?
Hypothesis 1 is spot on.
#2 is more challenging to assess: The errors in Britannica are smaller, and I think I’ll judge myself wrong.
#3 I think is accurate, if only because of the long entry on Microsoft.
#4 Ed did not assess, or comment on.
#5 Ed didn’t check Encarta.
So, I think I get 2 out of 3 for the tested hypothesis.