i want to say though at the time of the price drop ea had bought the rights to 2k games. so technically they didnt care which one was selling. i could be wrong but i think i read something to that effect.seeing as they were selling for what 29.99 and madden always sells for 49.99 on ps2 i would think that the 2k series would outsell madden just because of that, i never played any nfl 2k games until 2k6, and i bought it simply because it was cheaper, i loved the gameplay of nfl2k6 and the fact that you can run through people, i loved that part......
if priced the same i cant imagine 2k would of been a threat.