Build timescales can be affected by the options specified - although availability of certain options would be more likely to delay build, rather than bring the build date forward. A few years back when the mk6 was the current model, there were issues with the supply of DSG gearboxes and rear view cameras that delayed the build of some customers cars.
I don't know if colour has any impact on build dates but I'm assuming that car bodies are painted in batches of the same colour. So it could be that your car has been slotted into an earlier (than originally planned) batch of Tornado Red cars; I assume this is more likely if your car is standard spec, where build won't be influenced by options availability from VW's suppliers.
