Show me the data. What i read on this subject is it gives the team a tremendous advantage, and I read that the success rate is higher than 50-50.
I remember reading that in an article right after the Heat went 9-8 to start the season last year, the team then had an hour player-only meeting (sorting things out with one another) , then ripped off like 11 road wins in a row... tying the NBA record for most road wins in a calendar month.
after starting 9-8 before the meeting.
I also distinctly remember another team I follow, the leafs (NHL), calling for a team meeting in 2003. They were playing dreadful hockey. After that players only meeting that the captain Mats Sundin called for, they performed to their capabilities IMMEDIATELY going a ridiculous 16-1, or something like that. It was the best 17 game string in the last 30 years for this embarrassing franchise
http://www.tmlforum.net/index.php?topic=5533.0;wap2