Hi Eamonn,
As a former Venture Crew Advisor, I have noticed that the young ladies are years ahead of the young men in regards to emotional maturity. I saw the same thing, the young ladies would get the jobs done, it has nothing to do with the young men having been in scouts. I also noticed the same thing that you have, the kids would real enthusiastic at storming sessions, and then not follow through with the execution without being "ridden". I'm sure that there are people out there that will disagree with me, but today there are so many activities for young people to be involved with, they get too involved and just won't take the time to run a crew/ship. Just my 2 cents, if anyone out there has any ideas to motivate these young people, I'm more than happy to hear them.