"WTFast is the Gamers Private Network (GPN), a global data network designed specifically for MMO Gamers and their game data. The WTFast GPN ensures you always have the optimal game connection - increasing your game speed, reducing your game disconnects, response deviation & lag."

from www.wtfast.com

Are they only using proxies and if so could that possibly help?
Are they just faking the ping?
Anybody have any input on this?

Some reviews:

"I tried WTFast in attempt to lower my ping for LoL"
WTFast promises to destroy lag in online games; we’re skeptical
No WTFast, You Can't Bribe Customers For Positive Steam Reviews
WTFast on Steam