I will rate Warne and then Dhoni as best leaders of the IPL T20 so far. Sehwag comes a close third with Saurav.
Dravid, Yuvi, Laxman and Bhajji (and now Pollock) are very ordinary.
I heard sometime back from Drvid, that leadership is just another role and all players playing in the team know thier reoles and responbility, which I beg to differ immensely. Even if you have greatest of people in your team (be it sports, science, technology, business, enterpenurship), you have to have capability to create a team-building and camaradrie. I think, DRAVID has miserably failed in this pursuit. he is a firm beleiver, in let the things happen. The GENNEXT and AUSTRALIAN attitude is to MAKE THE THINGS HAPPEN. Probably, that is why despite being old aged, the top perfomers of the IPL does include aged and retired AUSSIES, and the most failures are from GREAT and FABULOUS Indian players.
WARNE is the best captian of IPL so far in maximizing the limited resources well and filling the young bunch with self-belief. DRAVID and LAXMAN I reckon are the poorest of all.