Big Bang Level EXP Curve

Simply put, NO.

With even moderate funding on my Chief Bandit, doing 15~30k damage with Band of Thieves at level 105 on a level 98 monster, it still takes me 3 - 4 hits to kill these stupid Homunculus. Saying you'll always be two-hitting monsters is out-right false and gives majorly false hopes to players. In fact, I can barely three hit kill Skelegons, a monster in the 150 range, with my Viper, who does ~150k damage per Dragon Strike.

What he said.
And don't think by fighting monsters way weaker than you, like you would do Pre-BB, that it would work, because it doesn't. Fighting monsters 10 levels under you because you'll 1-shot them completely obliterates your EXP until about 105+ (At which point training grounds become significantly more scarce as well).
Even after 105, fighting monsters your level is still a good idea (Unless you're after something specific).

In reference to the original post: That graph is hilarious. By looking at it, it implies that the curve is exactly the same until like 100, which is simply wrong. Getting 100 is extremely easy in Post-BB, where Pre-BB it was pretty hellish. Not as hellish as 101-200 of course, but that's not the point. They're no where near the same curve, at all.