Hearsay is when you repeat someone else's testimony that you (supposedly) heard. Instead that person should make their testimony directly, in their own words.
The assertion you replied to is a simple assertion, not hearsay. Just look at the income MegaUpload received from each file hosted and correlate to whether it is infringing or not and you can prove or disprove the assertion.
I don't think it's too much to ask that if you go and use legal terms as if you're pitching a legal defense, that those terms are actually used correctly. Especially when the objection is about the form of a response and not the actual content.
You could certainly argue that rayiner hasn't provided justification with his comment, but unless you've been through MegaUpload's books you saying "BULLSHIT" has just as much (and as little) meaning as what rayiner said.
The assertion you replied to is a simple assertion, not hearsay. Just look at the income MegaUpload received from each file hosted and correlate to whether it is infringing or not and you can prove or disprove the assertion.