Yes, many carry chain whips. Many others carry homemade, and lighter, chain whips. Many others carry devices such as the hypercracker, AKA Stein Mini Cassette Lockring tool, cited above. Many others carry FiberFix spokes. Many others improvise with the nylon strap. Many others carry nothing and accept the risk. It's all over the map.

I carry the hypercracker and FiberFix. I think tools such as a chain whip, pliers, vice grips, cable cutters, cone wrenches, etc. are all overkill for a tour, especially a tour in any first world country. I'm not saying you'd never need them, and I'm sure people can come up with stories where they were glad they had these tools, but they fall below my risk/reward/weight threshhold.