I was getting tons of lag all the time and just always chalked it up to being because of so many people in my area using the internet (Sacramento,CA area), but I was wrong. I made my characters on Coilfang because WOW listed it as a PST realm, and to me this meant west coast right? Wrong!!! The PST realms are also on the EASTERN COAST in New York. So I was getting lag because my realm was on the other side of the fricken United States. So I made my new team on Skywall and my latency is only 27 now compared to 1000-1500 on Coilfang. Check out this site for realm locations:

http://www.wowwiki.com/US_realm_list_by_datacenter