With DP's, the roo's get bigger, but the hens get more fat. I've never noticed any change in taste from testosterone. Older birds always have more flavor, though, than young ones. Young ones are more tender for quick cooking; for older ones, you need long and slow, low-temp cooking.
With broilers, you process them so young, you might not notice which is which, but the males do tend to get bigger. When I ordered them a long time ago, I ordered all males, so I don't know what the females innards look like at that age. The ones I have now, all the ones I've butchered so far have been male, but I'm sure there are a few pullets in there. So I'll find out as soon as I process them.