Video compilation of Sin Cara in Mexico as Mistico: http://youtu.be/3sqoY0hCOTU
Couple videos of Sin Cara attempting his finisher La Mistica, but Evan Bourne & Ted Debiase both botch.
I have no doubt that language and the different wrestling style of WWE wrestlers has a lot to do with Sin Caras performance.
Many on here are so damned narrow-minded about the issue. It seems they think that WWE is the only form of wrestling around the world, or they think that WWE is the best form in the world. It's hard to transplant a wrestler used to only lucha libre into the WWE. It's also hard to get the WWE wrestlers to automatically accomodate the lucha libre style.
Rey Mysterio is far different, especially because he's past his prime and has aged significantly. His style has been well adapted to the American style of wrestling over the years.
I'm not saying Sin Cara is the best, by far. But I'm saying that some of you are being really stupid in assuming Sin Cara absolutely sucks at wrestling, without even taking a look at what he's done in Mexico.