Why are so many people going to wait several months for the GTI when they could get a GLI right now (or in a few weeks). The GLI and GTI are identical in several ways in regards to sportiness - same front end/engine/interior goodies etc. Not to mention that the GLI is a four door sedan and will probably have a better resale value. I understand some people would like the 2-door hatch, but especially for people wanting to wait maybe 2 years for a four-door GTI, why not get a GLI?
In the previous generation, there was a signifigant difference between the Jetta GLI and GTI (especially the non-2004.5 GLIs), but for the MkVs, it seems the big difference between the two is sedan and hatchback.