I don't want to throw water on those guys who've read these posts, but as they write in the small print at the bottom of the page of diet commercials: "Results may vary" and "Results are not common". I am not saying growth is not possible because IT IS. It's just that like fish stories, penis growth claims need to be taken into perspective. 2.5" growth in 3 months or 2" of girth in 6 months with the extender alone leave me with skepticism. I am not naive, I know that after long hard work I gained 1.25", but I can tell you my 1" girth gains were primarily from manual PE techniques, not the extender alone. This is why I continue to advocate a well rounded PE program that includes the extender as an integral part.
Reading about unusually large (and probably uncommon) gains in short periods lead to frustration and early abandonment before you give your self to reach your full potential.
I can only say that PE advocates on large forums such as Thunder's Place will tell you that if you want gains you must commit to a long term vision on growth goals -- I'm talking about a year at minimum. If you're looking for a quack fix, try surgery or magic (and I wouldn't trust either). You've got to be realistic.
If your in it for the long hall, stick with it, communicate your successes and experiences, you'll find guys with join dates longer than 4 - 6 months and numerous posts (not necessarily "posting whores" like me) who will be here with you giving and looking for support. We will gain together.
Good luck.