First, thanks everyone for all of the info posted here. It was really useful info.
I just changed my oil, 5086 miles, and I noticed a couple of things that differ from the original write up.
1. So far as I could tell, my drain plugs were identical. One of them, the one farther towards the front of the car, did have a blue dot written using a marker, just like you can see in the pics posted by GregW.
2. It took 35 NM of torque to loosen my drain plugs, rather than the 18 NM and 10 NM suggested in the original write up. Consequently, I tightened both drain plugs to 35 NM. Actually, when I saw the 18 NM and 10 NM, that seemed quite low to me, and 35 NM is more like what I would expect.