It's all about the sound you want to create. The technique is just a means to an end. Although I dont do Sarod, a good example of it would be Mr EVH playing the tremolo picking part of Éruption. Actually, anytime Ed tremolo picks He seems to do a motion that is real close to what Pebber describes.
If it is picking speed you are concerned with, There are a few guys you should check out...
Rusty Cooley
Michaelangelo Batio
Mike Stern
Eric Johnson
Joe Bonnamassa
George Bellas
Shawn L'âne
Paul Gilbert
Tony MacAlpine
Jason Becker
Marty Friedman
Marshall Harrison
Terry Syrek
Ron Thal
Jimi Bruno
Django Reindhardt
Chris Impelliteri
John Finn
Nuno Bettencourt
Some better than others, but all of them good enough to release a record or two...
Of course, guys like Vai, Malmsteen, Satriani, Steve Morse, John McLaughlin need not be mentioned, eh?