I leave work at 4.30PM so I usually miss the worst of the rush hour. I use the on-pavement cycle paths on the way home more though.
In the mornings I like to leave before about 7.15 otherwise the traffic gets bad. I don't mind filtering, and my confidence is improving but I would rather avoid it if possible, and I have a busy roundabout to cross. This week I've had to set off later and I've really noticed the difference in the traffic levels.