Let me start this reply by commenting on how on any other forum this would have already broken out into name calling and keyboard gansterness..lol I like that we can discuss this without getting into an argument
Now back to your reply. Your analogy is based on going to a higher gear or staying in a lower gear. The cvt at full range is essentially in ''high gear''
The lighter rollers do allow the engine to rev up higher before engaging the belt, and they do keep the RPM higher while the belt is going through it's range of motion. But once the belt is at the top of one pulley and at the bottom of the other pulley, it is no different then if the rollers were heavy.
The rollers don't change the top RPM of the engine and they don't change the final position of the belt and pulleys.
Think of it this way. If you started rolling down a hill with the pulleys maxed out, the buggy would take off slow as hell, but would eventually reach top speed at 7500 rpm. It would be able to maintain this speed even if the hill gradually leveled out to a flat rd. It wouldn't matter what weights were in there, because you started with the pulleys maxed out. So as long as the pulleys are maxed out the top speed will be the same.