Finger foods after purees - 3 day wait??

When you start introducing finger foods after purees (like they say around 7-8 months), do you still follow the 3 day waiting rule? For 3 days, you give them just 1 finger food, then the next 3 days they can have 2 finger foods, etc?? I feel like I see people just giving their babies all sorts of food back-to-back, like pasta, broccoli, cheese, bananas, etc.