This is impressive. But, those poor frogs. Snark aside, it also doesn't say that much; Ali Wong's biggest laugh comes in large part from the fact that all her bits are arranged to build up to it. Ok! If you're interested in this stuff, a good listen is Mike Birbiglia's "Working It Out" podcast, which is a little bit like Marc Maron's "WTF", but with an emphasis on workshopping bits in progress. Part of what makes it…
Comedians try out a lot material (and variations of the material) on tour: I attended my first live show expecting special-level of polish and was disappointed. The bits I remembered, that did end up in the special had much better delivery, after much tweaking to see what worked and what didn't, I'm guessing.