None of the cited limitations of TCP performance are true.
they are also missing the point.
If you're going to run storage access over IP then you are potentially
allowing it to be run over the global Internet. If you do that you need
good authentication and privacy, and (if you try to do them in software)
authentication and encyption will eat far more in performance than
anything inherent to TCP or IP.
and no, it's not acceptable to assume that the storage device will be
behind a firewall.
Keith