It really just is a coincidence or your pc or something. Because im at a steady 8-10ms with HB on or off (i live in california) and on my laptop wireless at a stead 35-40ms while my friend in Idaho is at a 100-200ms with or without HB. But to be honest 120ms is kinda meh. people raid with 300+MS and they're good. At any rate, take a look at this. Maybe it will help, maybe it will not help:: Leatrix Latency Fix : WoW Tools & Utilities : World of Warcraft AddOns
100ms is almost nothing unless your pvping. Then it might be the difference in once action. The standard global cooldown is 1.5s or 1500ms. Your latency is .1s hit buttons/click faster.
It cant be my pc because since the updates of honor buddy have come out the past day or 2 when im botting my ms rockets to 100 so i cant bot on 1 account and play on another D:
Why not? 100ms is nothing. I killed Lich King Heroic on a 800ms connection. When it was current content. Many Austrailians in my guild play with 400ms+ connection all the time. And I raided fine in WOTLK and TBC with a satellite connection (1500+ms) Now I use mobile broadband (3g cellular) which never sees latency lower than 350ms. Anything under 250 is considered normal. Even at the office i have 100-200 on DSL.