@Reckless, not necessarily (now that's a fun word to spell
) but it does allow you to get -bigadv (due to the 8 'cores' minimum requirement) so it will rake in alot more points.
The difference between Hyperthreading on and off changes per WU/Project, some take alot of advantage of it, others show a very small/or no difference at all.
Also, you will only show up on the FAH website after completing at least 1 WU, which then has to be processed by the Points server. This happens every hour, on the hour.