well then you need to start asking the right questions. and selling someone a transdermal is not the same as "working" with them. in which case ulter could say that he has experience with tens of thousands of topical users. That being said he has likely dealt with many more topical users than yourself, no offense.
carrier can be a factor in irritation, but androgens are primary and secondary irritants themselves (mainly through immune modulating effects- though there are other pathways). Carrier is rarely the issue, though it can be an exacerbating factor.
as a note- site related skin hardening, scaling and hair growth are known side effects of androderm and androgel. They try to minimize this and irriation by enforcing rotation (at least with the patch) and that is with a 1% solution/gel.