Love it, when PS3 was ahead by a marginal amount (Around 200-300k) it was unacceptable to use the term "statistical tie", because PS3 has won the year instead, regardless of how small the gap was. Now the chance that 360 is ahead, we'll no doubt hear the cries of statistical tie.
I'd say it depends on how much 500k+ and it's a victory rather than a tie.
Disconnect and self destruct, one bullet a time.