*shrug* couldnt hurt to include them in your next cycle though. Most people start on them (i did.. and then only after learning about scar tissue (around 6 wks into sus cycle) did I pluck up the courage to include quads (picked due to size of muscle and minimal chance of hitting bone as opposed to delt, pec, calf etc)
Good post though. Interesting to see if there are any knowledgeable replies. I always was under the impression it didnt matter what muscle you injected it into