Yup. I shoot my Human Chorionic Gonadotropin (HCG) IM also. I feel it working quicker; maybe placebo. I just don't like subq shots.. They always make my injection site itchy
Not placebo - IM has a faster distribution rate than subq. More blood flow in a muscle than in your hypodermis. Same faster distribution as with B shots, HGH or even oil-based such as test (I've noticed some do it subq).
Technically, half life is harder to predict subq than IM, but is generally considered longer (since there is a correlation to distribution rate).