Interesting answers. In groups, I'll be in the back of the pack. My bike's not the fastest and I don't like being crowded from behind. So, by all means you can go first. On the freeway it's always about 5mph faster than traffic. Never sit in a blind spot. Always just left the area when the cars move over. Odd how if you ride at the same speed as traffic somebody will always ease you into their blind spot, then forget your there. Don't worry too much about the speed limit. More about the conditions of the road and traffic. Slower or faster as needed. Left hand tire track mostly, staying off the oil patch in the center of the lane. Mindful of the scenery too. Horse apples might mean a buggy in the middle of the road on that next turn.