Has anyone tried the Hughes Whiplash /6?

There's no telling what the advertised might be, but it reads like -10* [email protected], so judging from the right-up (below), I can't imagine it would have any rumble at all, but I'm just guessing.
From Hughes;

The first user of this cam picked up 2" of vacuum (from 18" to 20". Cranking compression up 20# from 115# to 135# over a fresh rebuild on a stock engine. Just like adding higher compression ratio pistons and feels A LOT stronger all for the price of a cam and kit.

Click to expand...

I'd buy it for the pressure increase alone. And the lift is a bonus.