One observation: This is indeed a problem for web development, but a non-issue for mobile development. Whether iOS or Android, one guy just clicks "New Project.

One observation: This is indeed a problem for web development, but a non-issue for mobile development. Whether iOS or Android, one guy just clicks "New Project..." in their IDE and pushes it into a git repo (one may have discussions at this point whether to use a public github or a private bitbucket repo...), the others pull it and everyone is ready to go. That said, teams shouldn't only form around ideas, they should also form around technologies to avoid endless discussions. Also, be open to work with a new technology and ask others if they want to do pair programming with the newbie being the observer/navigator. I did this once. After an hour or so I felt I could provide valid input. Also, pair programming is a really good way to get to know another person!