There is "battle leveling," or something like that, that's in place for all characters when they enter Cyrodiil. This sets your character's stats to a standardized loadout to even the playing field for the 10-50 crowd, so attribute points won't matter for you when you're in Cyrodiil.

There was word a couple of weeks before launch that they will be making this optional as it was screwing with the 45-50 range and pulling down people in veteran ranks. I can't remember if the veteran rank issue has already been fixed, but I know that currently there is no way to use your real stats in Cyrodiil when you're under level 50.