The kids were so much fun, the subject matter (Molecular Evolution) was right up my alley, and we had plenty of time to get through the material even with my tangents.
I had one kid come up and thank me for all the tangents; he said that he has a hard time focusing on any one topic for too long, so by constantly switching it up, he was able to absorb a lot more.
I think this might be representative of the new generation. We get everything in bite-sized bits anymore that without constant change, students zone out. This is just my theory, I should probably check and see what research has been done about it.