I was puzzled as to why this question was even asked. I didn’t think there was any doubt whatsoever that stretching produces EL gains. It’s the basis for hanging correct? Surely not as much weight, but the same principle. And also, many people have reported gains with ADS and tension devices such as the JES-Extender, which are entirely based on stretching. Never even considered that it didn't add to EL. Huh, guess I should use more critical thinking :)
But for my two cents, I would say stretching definitely adds to EL. I am living proof (for myself at least).
Cheers,
Dreamy