Earlier quoted context omitted.
Really? It seems like a glowing appraisal. He seems to think that Sam is devestatingly effective at what he does.
If I didn't know Graham was English, perhaps I would take them at face value - and, indeed, perhaps I should anyway. (And my characterisation was an extreme one!) But: they do just all sound rather coldly backhanded, if you ask me.
The other thing is that if you take a look at Paul Graham's blog posts, he used to regularly thank Sam at the bottom of these -- this isn't something you do if you don't like or respect someone. However, on the other hand, perhaps they fell out at some point? I can't personally make out that signal from the little data there is.