yes and no. some signs on the frets will always show only due to contact between two metals. how deep they go depends on the player's fretting hand.
however, on this bass, which has 11 years of work on it's shoulders, there were no signs. the other basses of my friend (a couple of Fender) showed the usual signs, like all the basses I've owned in the past.
the Ripper, with 41 years on it's back, no signs.
for example, I'm not a "strangle-the-neck" player, I play softly with both hands and usually keep the action so low that I don't feel the pressure of the fretting hand, but still I've had basses with chewed frets (by nickel or even flats) and basses with just some signs.
these two Gibsons don't show anything at all... I play this bass almost two hours a day since half July, and the frets look like shiny brand new frets.
even the hard "bronze" frets of the Warwick already show some signs of the contact...