If you look on the growth charts for babies, 8 pounds is actually the 75th percentile.

Meaning that 8lb babies are still well within the realms of "normal" for a newborn.

An 8, or even 9lb baby is not a "huge baby". It is a normal sized baby.

OB's frequently do get this wrong and trying to guess just by looking at you...well I don't think I really need to point out the accuracy of that method