GG,
I've been keeping a casual eye on quinellas at Ascot also. The only comment I would offer is that it usually represents better value than the exacta. As two exactas equal one quinella you would expect a quinella to be about half the return of an exacta. In the majority of cases, the quinella pays much, much better than this, probably due to the smallness of the exacta pool compared to the quinella pool.