Actually no. Genetic drift is a false proposition. Neutral mutations do not spread. Reason is quite simple, in any population the genes of each individual will reproduce at the same rate as that of other individuals. Since the original mutation occurred in only a single individual a neutral mutation will only have the same number of descendants as those of any other individual in the population. What this means is that if there were 1000 individuals in the population, a neutral mutation will always be present in only 1/1000 of the population no matter how much the population increases and no matter how many generations one goes forward. Further, because a new mutation is only present in a single individual, the chances of its being lost by either random accident to the individual carrying it or by a short string of unfavorable odds (for example if one only has two quarters and consistently bets on heads coming up, chances are that after enough tries one will lose both quarters). So neutral mutations will not spread and most likely will dissappear from the population entirely.