I'll answer both posts in one mate.
The majority of them were blooded by Lampard, and were of very high quality at age 18, in all likelihood better than ISS. I would say all were better than Gordon.
Chelsea have a fantastic youth set up to 18, but have probably not brought through and developed players as well as we might have expected. This isnt a controversial view, a lot of Chelsea fans I know say much the same.
Maybe that will change under Poch?
But if I was a young kid, I wouldnt go to one of the top teams, as it's highly unlikely you get a regular chance in the first team. If I was ISS I'd be concerned that I stall, like so many others have.
However, I have heard Chelsea have offered him a huge wage packet, so hes probably made for life.