What would be the purpose of lying and saying you don't watch tapes? In boxing, if you have a good trainer that knows how to break down tape and formulate a gameplan, you really don't need to watch tape.
Ego. I don't have to explain it god damn... Some do some don't. I think Floyd tries a little too hard to say he doesn't care about his opponents like that, (see Mosley face-off when talking about not really watching the Marg vs Mosley fight).
Goodness gracious! You mean to tell me the PPV P4P champ would be dishonest to boxing fans? I am blown away. This bastion of reason and truth.... lying to boxing fans. Inconceivable.
It does not necessarily mean he posted it... many fighters have their team post or answer things. Some even hire PR companies to do the work.