It's not petty. The experiment itself is fairly boring; it's a variant of a routine genetic mapping that we've been doing since Mendel, and the form of the outcome is unsurprising.

The only thing that makes this interesting is the length of the experiment, and how it clearly illustrates a basic principle of evolution that the creationists say is impossible.

(Also, iirc, Lenski is one of the experts who testified at the Dover trial....)