Sixten does his utmost to convince everyone that Railgun is a superior show, mostly using the device of point-by-point contrast with Index. Sequels being better are not unknown (e.g. Nanoha), and if I didn't know that he would be using the same oratory for any show by J.C.Staff, I might've even been convinced to give it a try. Poor Mr. Nishikori though. Sixten's put-down of him was so brutal, that I even marked a couple of his series for future viewing.

UPDATE: Rocket does the same, a bit more concisely and with yuritard angle.