Just like 4E!
The thing is, 4E is designed to be simple by being streamlined - everything falling under consistent mechanics. And we still see people getting rules wrong, even though there are only a few rules we know so far.
Rel's point, I think, is that OD&D is simple by being loose, and so it's much harder to get a rule 'wrong', since it's not really possible to get a rule 'right', either.
If it were up to me, I'd probably put the thread back in the 4E forum - I think that the comparison between OD&D and 4E is at the heart of what Rel is saying. But I like my job too much, and I'm not going to risk sticking an oar in right now.
-Hyp.