So what does it matter if Linux sockets are slower or faster then Windows? If you are on Linux, you have to use whatever Linux gives you.
I dunno if Linux has the equivalent of named pipes. I vaguely recall that Linux has a way of using shared memory for interprocess communication. That would be hands down the fastest if it's available and can be used by MySQL.
An optimist sees the glass as half full.
A pessimist sees the glass as half empty.
A realist drinks it no matter how much there is.