Correct me if I am wrong but hasn't the Tiger always been an OD class. Has the Tornado also only been an OD class.

OD classes still can under go developmental changes. This could VERY likely still happen to the Tiger. With the best of the best sailing on and involved with the development of a potential Olympic Tiger, the Tiger will become quicker and may become the pinical of F18 designs. Amazing the tranformation of the Tornado over the last 40 years with development to rig AND hulls despite the hull shape still being a 40 year old design. This also lead to the price of the T going through the roof. Your a fool if you think this can not happen to the Tiger also and not effect the F18 class also.