The poncho was effective enough in keeping my head and midsection dry, but after a while it started to fog up and build up moisture, to the point that I decided to ditch it by mile 2. Luckily, the rain let up for most of the rest of the run. Not until the end of the run did it start to do more than drizzle, but by then, the rain was not too unwelcome.
It was a pretty good run and was actually my fastest paced run over 10k ever. For not racing, that is pretty encouraging. I also had my fastest "training" 5k in the last week and I set another monthly mileage record in April. In terms of running, everything seems to be going pretty well at the moment (knock on um... the laptop).