New Golf GTI (7.5) questions

[theaxe]

I'm considering a new Golf GTI (something like this) and I have a few questions before I approach dealers...

1. What's the usual lead-time on a spec to build order?
2. Any chance of discounts, the PCP quote suggests a £1000 dealer contribution, could I do better? I'm assuming not on a car that's not out yet...
3. Roof racks - how does a roof-rack attach? Does it have standard anchors? Also, could I fit four bikes on the roof?

Thanks!