I'm surprised to hear that. I have the same hone and I find it's a very fast cutter, certainly on a par with the Chosera 1k.

The only thing I've noticed is it tends to glaze slightly faster than the Chosera but other than that it's a great stone I've found.

If I had to give away all my stones I'd keep the 1/4/8/16k Shaptons and my J-Nat. With that set up I can get a great edge on pretty much anything!

How recently did you lap your Shapton?