I don't know a lot aout concerta, but I do know that it is a longer acting drug and 10 minuets is not long enough to determin if you feel high enough yet. You should definitely wait a little longer, atleast a few hours.
Yah and when u snort it you will fell a high almost instantly! What I did was I snorted a 27 mg then I broke another one up and put it under my toung and so far I feel good