Originally Posted by jock
You've done enough in D Grade (consistently). Go up so you can challenge yourself and improve. As you go through the grades the racing is different. The pace during the race gets less choppy so it's "generally easier" for want of a better description, but it's faster and the attacks are longer and more intense. Ego's are usually more intense too

I understand what you mean by less choppy and easier, remembering when they threw me into C for my first race... it was a much more consistent pace than D (although quicker, we usually ave 33ish and C ave 35ish).
One of the other blokes went up a week or so ago and reckoned that C was much smoother to race in.
I know their sprint speeds are around 56km/h, but with a faster moving bunch/leadout, I might get close. (53.5 is my quickest to date)
Doing my intervals twice a week at the moment. Sprints on Tues and hills on Thurs