Just because certain low tier characters can be higher tier characters doesn't nessecarily mean that the higher tier characters will be taken down BY A TIER (well, maybe if they're borderline). Look at Fox from Melee for example. Bowser, if i remember right was a counter character against him. But it really didn't affect Fox's placement. The reason? It's because as many have said before that the reason the higher tier characters are in the higher tiers is mainly because their strengths outweigh their weaknesses. Now, that being said, I think some of the placements on the current list are probably wrong, but it is the first version official tier list for brawl.