Are the 69xx capped at 5% overclock? More importantly how do the 69xx and GTX 5x0 scale with overclocking?

It seems that the 6870 and GTX 570 are pretty damn similar. To that end, it seems that if the AMD offering is capped at 5% OC then nVidia has a huge chance to be the 'better choice' (at least in these parts).

/anxiously waits for watercooled overclocking results in a few weeks!

Also, am I making things up or did AMD say 'no more ub3r cards, scale instead' a few years ago?

$180 6850
$220 6870
*$260 6950 1gb
$300 6950 2gb
$370 6970
$440 CFX 6870
*$520 CFX 6950 1gb
$600 CFX 6950 2gb
$740 CFX 6970 2gb

seems to scale along the price & performance range pretty well...