I would agree that airlines like Virgin dont give a jot what school you went to, however they require in the region of 2500 hours before you even get a look in. By that time who cares what school you were at, you have experience and thats far more important.
HOWEVER
The operators that take low houred pilots fresh out of training , ie Ryanair, FlyBe ( who very recently were asking for OATS recommendations) for example do care. They activly recruit from these schools and look for recomendations from them. Why? Because they know the full scope of their training and have previous experience of pilots from the schools. I am not saying that the pilots from these schools are any better than any others, they are however a known quantity, and this in turn leads to less failures, and a saving to the company.
I would agree that the chances of getting a job through a school recommendation are very very slim however....
At the end of the day its what got me my first step on the ladder.