Bob: Actually, I see that a lot of that to one extent or the other with club race skippers and it runs the full gamut from a little to a lot. There is one thing I've noticed and that is the poorer the skipper is at sail trim the louder he gets!! I race at the Catalina 30 National events with a group of C30 sailors who come from all over the US. We get together as a crew and take on the locals. Since we have been racing together we know each others habits and there is very little conversation on the boat. In other words, every crew member knows and does his job. The initial trim is set by the crew member and then the skipper will ask for a little more of this or a little less of that. We have been very succussful and generally finish 1st or 2nd. The quiet boats are generally the most successful boats.On boats I'm asked to crew on from a sail trim improvement standpoint, I always first speak to the skipper about his crew and their level of experience. After about 5 minutes of conversation with the skipper I already know his level of experience. If they are an inexpericed group, which they genrally are or why would they be calling me, the first thing I do is schedule a practice session and I work with the individual crew positions. When we are finished, everyone knows their job and during the race, they just perform it.I always explain to skippers that crew is hard to find and as Mike (Caseville) indicated, why would anyone want to subject themselves to verbal abuse. So since your crew is donating their time then treat them with respect or you'll be looking for new crew all the time.