A few weeks ago I rode with an identical 2008 Honda Silverwing with the only 'main' difference being that my SWing has 24gr Dr Pulley Sliders vs the other SWing having the stock OEM Honda rollers. At one point we decided to do a ROAD TEST to determine if the Dr Pulley Sliders were much faster (they sure feel faster) that the stock rollers. Both SWings were about equally loader (rider and gear). The ROAD TEST was on a country road that was in perfect condition, lanes were plenty wide, and on an uphill grade. We had decided to 'stop' the test at 70mph (indicated). We only did this once - it may not be very scientific - but here are our observations.
MY Notes: We both seemed to start about the same time. I was clearly accelerating faster than the other SWing - but not really that much faster. As we went faster I was not pulling ahead any faster - and at the end I am guessing that we were only separated by a couple of bike lengths (but a bit hard to say as mirrors are misleading).
OTHER Rider's Notes: I opened a moment before you (~0.5 seconds?). Your bike pulled steadily ahead until ~35 – 40 MPH and then the bikes were perfectly in sink. The evidence here is that the DR rollers help at the start and things level out after an initial improvement in acceleration.
My conclusion is that the 24gr Dr Pulley Sliders are noticeably smoother than the stock rollers (we had swapped bikes for part of our ride) - which may make it 'feel' as if it is faster - but in reality it may only be marginally faster. However, it seems as if the Dr Pulley will give an edge when pulling out at a traffic light - when sometimes you want to be first. In summary, for the great smoothness and what may be a small acceleration boost - they are indeed a worthwhile investment. At some future date I would like to try a set of 22gr Dr Pulley Sliders!