The backing plate is very effective, that is it attaches to the GG polisher, it has hook and loop on one side and this holds your pads securely. It appears to be well made and I've never seen a thread where the factory 6" backing plate has failed. If there is thread like this then failure for the 6" backing plates is far and few between.
If you look at the Griot's Garage foam buffing pads, they are about 1" thick and I just placed both a Griot's orange polishing pad and a 6.5" CCS pad on the Griot's DA Polisher and turned it on at the 6.0 speed setting and it rotated the pads under firm pressure with no problem.
I tried the same thing on the Porter Cable 7424XP and it too rotated the pads but the Griot's was able to rotate the pads at a faster clip than the PC all things being equal.
This was done using clean, dry pads. As pads become wet with product the power coming from the tool, (either tool), is dissipated, that is the wet foam absorbs the power and this is seen as reduced rotating ability. Clean, dry pads always rotate better on DA style tools better than wet, saturated pads. So you can buff out a car no matter which tool you own, or what size pads you have by simply switching to a clean, dry pad more often.
If you really want to do the correction step faster on any vehicle, stock up on foam cutting pads and/or polishing pads so you can switch to a faster rotating pad anytime you see performance fall off for the pad you're currently using.