First, a major question: does it load successfully in the end or does it freeze? Try disabling intro movies in the ini file. Defragment your hard drive.
Second question: does it occur for mods (only?). I experience really slow loading of some mods (e.g. FfH 2) (over 2 minutes of delay - dunno what for - and only then the initialization actually starts).
Third question: what is your computer? CPU, RAM, graphics.