Drake's rule

Drake's rule states that the genome-wide mutation rate is more or less constant across al species from E. coli to the house sparrow.

Data

From what I think being Drake's original paper (table 1, page 4) on the subject (see here) is at the order of $3\cdot 10^{-3}$. When I look at this paper, I see that the genome-wide mutation rate is roughly around 30 for human. When I look at this speech (at the 60th minute), it seems however that the genome-wide mutation rate in human is 2.2.

What is going wrong?

Do I mix-up different concepts or are there some very contradicting estimates depending on the article we look at? Isn't the genome-wide mutation rate, $U$, which is just the number of de novo mutations transmitted to one offspring on average?