I'm always in top Takes maybe 100 metres to get a decent cadence up. So I should actually be using my gears?!
A long time ago I had a mature time trialer in the CC I was a member of, tell me not to grind the gears. He'd grinded all his life and said you leave yourself open to ankle/knee/hip problems plus varicose veins.
It's alot easier to get up to speed from a standing start if you use a slighter lower gear than you normal cruising gear.