I reckon you're right, Trekkles and Mum.
The 'strain' of GD has really deteriorated over the years, such that we're not bothering with them any more!
It's a shame, as they used to be a fabulous tom, and I used to keep the seed every year, but had to buy some and they weren't half as good!
I think the weather has had something to do with it all as well!