too short? the 6 speed is just the same in terms of top speed, I think 5th on the 5 and 6th on the 6 are pretty much the same gear.
the 1.8T doesn't need 6 speed in my opinion, it has a decent spread of torque to haul you along fine in any gear. Any time I've driven 6 speed 1.8T cars I just get annoyed at how often you need to change gear! 1st is also useless as it's too short, and the rest are just closer together.