Totally agree - but I can't shake the following:
If you accept btc, then you probably know a bit about it already. Why then even use paypal? I've seen the old: Num_Paypay_Users > Num_Btc_Users; therefore, bigger base of potential customers.
Still though - buyers/sellers of purely digital goods - if there was any group that I'd expect to be able to get bitcoins, it would be this one...