After they had dried, I was able to shake the grit off of my cycling jacket and reflective vest, and even brush it off my leg warmers. The bicycle is another story.
There wasn't time to give it a good cleaning before I had to leave for work, so it had to wait until I got back home this evening. By then there were already several rust spots on the cogs. In less than 12 hours!
I've seen that happen before. It's amazing how quickly a bicycle's drive train gets rusty if it isn't promptly dried. I work on a university campus, and it's easy to tell which bicycles have been hitched to a rack and left there. The drive train is all covered with rust, chain and gears both. It makes me wonder why the bicycles' owners even bothered to buy a bike.
Now my road bike is clean, and the chain has a new lube job. It looks as though the rain is over for a while, and I'm glad of that. I'm not in a hurry to have a rusty drive train.