Yep, you are expected to sail at around 5 knots on a quite common size of 32 ft. In reality you can push it to 6 or 7 knots, but you don't wanna push it in the middle of the ocean.

The shortest path is from Cape Verde to Brazil, around 1350 nm, but doldrums (area with not wind) is there, so not the smartest place to sail.