Two things I would point out with regard to the posted video:
1. A roller rocker is being used in lieu of the standard non roller rocker which 99% of anyone viewing the video would be using. I assume the roller rocker was used in on both cylinders, so all things being equal, probably not an issue but IMHO, not a representative test for Joe Sixpack.
2. The S&S Premium lifter ($270) is compared to the GM lifter; more expensive and manufactured to tighter tolerances than the S&S Standard ($125) or the GM performance lifter ($110 for a set of 4). A more representative and useful test would have been to compare the S&S Standard with a GM lilfter and the OEM HD lifter.
See the below pictures for a comparison of the HD OEM "B" lifter which is no longer available with a Comp Cams 850-1 lifter (top pic) and with a GM lifter (middle pic). The HD OEM "B" lifter was replaced by the OEM "C" lifter, I believe, in 2010. The "C" lifter was originally made in Mexico and did have some roller issue; not sure where they are manufactured now but quality seems to have improved. I have a picture but it doesn't wan to post for some reason. I can post in another reply if anyone wants to see it.

Note below the only difference being the hole in the piddle valve which could slow down, but not by much, flow of oil to the rocker arms. Of course, a set of $270 lifters is going to perform better than a set of $110 or $125 lifters but the real question is whether or not there is a cost benefit. IMHO, in a stock motor, almost any lifter is better than the current "C" version of the HD lifter but, unless money is just burning a hole in one's pocket, I don't see the cost benefit in replacing the HD OEM lifters with a set of $270 lifters when a set of Comp Cams 850-1 lifters for $70 to your door will get the job done. BTW, the Comp Cams lifters are basically a GM lifter but I don't have on broken down into parts.
