Absolutely thumbs up. I strive to achieve this: often when I write my first thoughts it becomes clear only later that I misread, or that I missed the main point, or that I'm completely wrong.
On the other side, it's true that people have very little and precious attention span: if you reply the day after there's already nobody listening. So try to struck a balance between impulse and reflection...
If it's worth saying, but not worth its own post, then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should start on Monday, and end on Sunday.
4. Unflag the two options "Notify me of new top level comments on this article" and "