It really varies. We have had them in the 21-22 range because everyone refuses to take a pull and lets a guy out in the front to rot, we've had others where one strong guy takes a massive pull and drags everyone along (26ish), and then others where strong guys trade pulls (26.5). Really its the surges that I worry about. When they start hitting 30+ at certain parts thats when gaps form and things get hairy.