Compared to what? Bitcoin is the fastest payment network there is.

I'm sorry, but just no.
There are a lot of next-to-instant payment methods like Paypal and Credit Cards, and even most altcoins are faster than BTC now.
actually, you can not have an instant payment when you send a huge amount of money while using paypal or credit cards. Bitcoin will give you an opportunity to make that transaction if you sets a affordable fee