Originally Posted by
caloso
This would be true where it's a steady speed. But many rides have a very mellow, neutral roll out and then you hit the start (which by the way will be a signpost or a guardrail or a tree or even a line where the pavement color changes) and then it's on like Donkey Kong. If you're not ready and able to match the surge and get in the draft, you'll be off the back before you know what's happened.
Which is why I recommend asking what's up at the start and being self-sufficient in any case.
Perhaps some clubs have this, but this scenario's a race more than a ride. I personally wouldn't think of this as a very enjoyable event; if I want this kind of thing, I'll do a Fondo, but to each his/her own.