Think about it though: if someone wanted to really be anonymous, would he put in small hints on who he/she is through his/her anonymous monicker? Obviously not as it would totally be a bad idea. The S-N thing is likely just a coincidence.
Nobody really knows is satoshi really planned on beign anonymous from the start or even had thoughts that bitcoin would he this big today, its hard to tell if he was just some secondary school nerd with a brilliant idea and some obsession or if he is a more advanced person with some status.
I'm not convinced that he was nick szabo and decided to use NS as a basis for his new anonymous name, like if it was planned he would have better left no trace of his original name or even use the first letters for the new name, he was smart for sure, so if he wanted to disappear he woudl leave no trace especially not one that would be easy to decode with a hint.
But there is every possibility that he didn't have total anonymousity in mind and must have had a few friends that knew him or probably wasn't planning to disappear from the start.