...I made three days ago a submission with the correct number (3.74). /. couldn't care less.
On average the degrees are 3.74, and this is why our paper is called "Four degrees of separation". 4.74 is the distance, which is one more than the degrees of separation. Unfortunately sociologists decided to count the "intermediaries" (so if we are friends, our degree of separation is zero), whereas computer scientists count "hops" (so if we are friends, our distance is one). This generated a lot of confusion. But, just to be clear, no, we did not round 4.74 down to 4; we rounded 3.74 up to 4. :)