I don't know what makes you so sure. His post is ambiguous, but I take it as significant that he claims to be working on a keylogger's output. That would almost certainly have real backspaces not "^" and "H". Of course it's impossible to be sure - he could have a screen-cap of a keylogger...
Certainly the Unix utility script records the backspace as the single character with decimal value 8, this is what I would expect from any "keylogger" as that is the "value" of the key that was pressed.