TWF and "Twitch Fighting" help/explanation

[Quarterling]

I'm thinking of rolling up a barbarian that will be using a great axe (what else? ).

So before I started planning him out, I searched the forums on advice and found out that best way to play a barbarian is to NOT get the THF, ITHF, and GTHF feats. Instead what should be done is to use the "twitch" method. This intrigued me because it would allow three extra feats and apparently I would be just as useful if I had taken the three THF feats.

Even after doing some more searching on twitch attacking, I don't understand that completely works, nor how it differs from attacking normally using the three THF feats.

So any help would be appreciated to get the most out my build.

[Quarterling]

Bump.