Kuroko is not the first teleporter who gets that onomatopoeia stuck in my head. Chances are I've used this reference before, and I will use it again.
My primary familiarity with A Certain Scientific Railgun is from the manga version. Well, obviously, since the anime just started airing. Despite the title, I have the impression that this show will not exactly be a shining pinnacle of accuracy in physics.
I'm not as familiar with the original source of A Certain Magical Index, having read the first few bits of the manga until what I think could be counted as the end of the (relatively long) prologue, but my impression of the male protagonist, Touma, is that while he has a special power, it is nowhere near as powerful as pretty much everyone else in the show. Touma gets to be the main character through a combination of luck, some skilful use of his abilities, and the sheer bloody-mindedness that is available to every male shounen series protagonist.
However, in Railgun, he's Mikoto's kinda-sorta rival, in that no matter what Mikoto wants to do, he can one-up her without even breaking a sweat, largely because his Imagine Breaker power is a great deal more general-purpose than her electromagnetism.
Same character, two different viewpoints. It's not a huge revelation. I just found the plot quirks interesting.
As for the actual episode itself, this is probably one of those series I'll be following if I remember to, since a) I already know the story, and b) I know there will be some measure of faux-philosophical angsting in store.
I wonder if it says something about me that the yuri-ness of Kuroko is amusing, but not especially titillating. Is this a special case, or have I changed my tastes?