This is true. Jango of course, is a "true" Mandalorian. I know this because I played the damned game, Bounty Hunter. Whatever that means. Point is, Boba Fett did not have all the years of training and whatnot, so we all assumed he was the number one badass. Course, Star Wars is getting weird, showing us in the Prequels how everything is just a tad bit better years ago. Guess it's kind of like the galaxy went into a Great Depression or something. No more two-headed sabres or jedi schools and shiny ships and stuff.

Bianca knows Star Wars books, and I think somewhere, something discusses how Boba survived the Sarlac Pit. Course, does that make him better than his predecessor? I dunno, but Slave I obviously had cooler features in the umm... newer... older movie... It's movie one upmanship.