fifty six percent of the population of people in the US ages 14-49 have HSV 1, so yes, very common, and the rates go up over 49.
Though we have no study, in my experience, genital to genital transmission of HSV 1 is very uncommon – most HSV 1 that I see genitally comes from receiving oral sex from someone who either had a cold sore or has a history of cold sores.
Terri