I tried that but you'd be surprised what an effect it has. Before I got wifi up and running, I trashed all the internet extensions, and so Quicktime wouldn't work!
A whole lot of other programmes went on strike as well due to various missing libraries that I was sure I didn't need.
Then when I eventually reinstalled the internet gear, something else must have still been missing that stopped TCP/IP from recognising the connection.
Even with all the superflous gear missing, it only shaved maybe 15 seconds off the boot time.