Just came across this thread thought I'd give my 2cents.
Those who are so quick to say he is crap, really do need to do some better research.
1. Actually go and look up Gary Dill's credentials even better ask any of the OBLS, he is a big fraud he did not spend long enough with Lee to learn anything. There were videos of him on youtube teaching the straight blast, funny funny video.
2. Paul Vunak, probably my first introduction into JKD after seeing Bruce Lee. But there are so many fake instructors under him eg. Sifu Lopez sells JKD intructor certificates on Ebay, you never need to train with him just buy the DVD, get a certificate and start up your school! (couldnt find the ebay page but here
Jeet Kune Do, Kali Silat, OFT DVD Certification).. this is an example of instructors under Lopez now
YouTube - kuliena's BOOM BOOM JKD Channel
3. Tommy never claims to be the best or the next bruce lee. But its evident from his training and the way he talks about JKD that he strives to be the best he can. As for Shamrock calling out Tommy, it never happened you can ask Shamrock yourself.
Last point those that saw Tommy at Seni will have seen how different he is now compared to the youtube videos that were recorded some 7years ago, he has really modified his JKD to become extremly effiecient and effective.