torrc default config ORPort should be changed to 443 from 9001
Right now if some one is setting up a relay in a hurry they will just uncomment some lines.
Therefore we are seeing more and more new relays using the default ORPort 9001 when they could be using 443. The relays are usually just a dedicated box for tor.
The ISP doesn't even need deep packet inspection to know a person is using tor, when the user uses port 9001 to connect to tor.
By changing the default config to 443, more relays will use this, which will in effect increase the privacy.