I bought into the hype that this 16 toother was really going to make a difference when shifting, and honestly, I don't think it makes much of a difference at all. Normally, when I am up-shifting, I'll push through 2-4 gears at a time. In fact, my shifts between the 13-19t cogs never really experience any "hanging," and nothing seems to take longer than it should; pretty much flawless to say the least. Anyhow, like I said, I kinda got sucked into the hype after reading reviews about this cog; however, shifting pretty much feels exactly the same when using the standard 15t my cassette came with.
Maybe you can tell the difference, but I surely can't.