How long did it take you to realise that the narrator had a split personality?

i figured it out after seeing the vision scene of him shaggin' marla,
after that scene every thing pointed in that direction, until the final revelation,
when he got to the restaurant and the barkeep told him his name was tyler durden,
that was the breakthrough point in the movie, in my opinion...
all in all, it was a great movie... i liked it a lot ...

it took me a while to notice it. i hadent noticed until he called that girl and he asked her to say his name again and she called him taylor that other guys name. and after that i had noticed that something was strange and that the only thing that really made sense was that he had to of had a split personality. but i didnt really understand that at the begining i was totally blind sighted

I realised also when he asked her to say his name again. I wasn't expecting it at all so I was surprised.

I won't lie, the first time that I saw this was when I was around 8 so it did not make much sense to me, but the fighting scenes were pretty awesome. It took about 3 years before i learned that the main character was suffering from a split personality.