My mom got bitten by a dog this year and her hand swelled up like a cantaloupe. It was a little dog that lunged at her from a shopping cart. Serious and unacceptable? Well ... not really, just one of those things. My mom shrugged it off because she's a sensible woman who actually has the courage and confidence to differentiate and rate things in terms of their significance. If it had been a pit or a Rott that lunged at here, you seriously tell me that it would have been equally serious and unacceptable. Yes, that does make you seem ridiculous.
Ah, the great hypothetical.
Maybe yes, maybe no, it's really impossible to say.
Larger dog have the potential to inflict more damage.
That is not to say they necessarily will.
One thing I do know is that I have been bit on the hand by a 'pit bull' and it never swelled up like a cantaloupe.