WOW's thinking like a programmer, not a normal human being, he is correct in one aspect, wrong in another.
Lurker is thinking like a normal human being, he is wrong in one aspect but correct in the one that is relevant here.
Based on what we are talking about here, the nod goes to Lurker. WOW's desire to add a wrinkle because he wants to displays his mathematical reasoning skills, while impressive, likewise demonstrates his inability follow the simple counting concept Lurker is vainly trying to point out to him.
When you count in the real, tangible universe, the zero factors in only to indicate a baseline, ie, nothing, the actual count ALWAYS starts at 1. This is why, since in the Gregorian calender doesn't have a year zero, decades are ALWAYS counted 1-10 thus ending in a trailing, round number zero such as 1901-1910 (JoMal's birth decade). Thus, the decade you 2 are fighting like children over, the first decade of this century, counts from 2001-20010. By that accepted and factual criteria, there is still one more season left in the NBA for this decade and the Laker's championship they won in 99-00 counts for the decade of the '90's in absolute terms and 00-01 count as part of the 90's and part of the 00's, although because it was actually WON in '01 it really should count wholly in the '00's. People seem to forget how to count when they see that "2" in front and thus, by that incorrect reckoning, LA's 3peat are all part of this decade, and purely for debate's sake, I am OK with that, however technically incorrect it is, and so WOW is partially vindicated; although that vindication is based on a false premise.