Just to clarify... I didn't buy the Wolfetone pups because I was unhappy with the stock Gibsons. The Gibson's sound great, and react very well to the guitars volume and tone controls, and sound good thru any of my amps whether clean or dirty.
I have a set of Wolfetone humbuckers in my Music Man Silhouette that replaced the stock Dimarzio PAF style hummers. Since I really like these Wolfeys, I got curious about their P90s. It's safe to say that Wolfetone makes excellent P90 pickups. But, so does Gibson... But, so does Seymour Duncan (Since I have a set of these, too, on another guitar).
But the King of P90s from what I've personally experienced, is the Kinman's with their Zero-Hum technology. The Kinman's are on a whole other level... which comes with a price of another level!