I have a chrono and was shooting my old bow with just a standard peep. I switched to the no peep and gained 11 fps. I didn't pay any attention to the noise as I was planning on selling the bow anyway. I just wanted to see what the difference in speed was. The only thing I changed was the peep and all the shooting was done on the same day.

My son tried the no peep on his new bow and didn't like it. He added the peep with rubber tube and only lost 6 fps.

After both of those I would say every bow is going to be alittle different but you will gain speed with the no peep.