Depends on the category in which you are applying.. some categories don't have any bearing on nationality

mine is Eb1- B

There is no country based waiting for EB1..

@Buzz King for both EB1-A and EB1-B?

it is the same. No waiting period. But, the process itself can take a year or two (based on how fast USCIS works)

thank you @Buzz King!