I dont think you understand Dominicans too well. I know very well that I will never be mistaken as a native, however here in Jarabacoa there are many white Dominicans that look less like stereotypical Dominicans than me. If I never opened my mouth many Dominicans here in Jarabacoa would think I was Dominican.
You think you know me and what I may or may not understand already Bob? That's presumptuous and just as erroneous as your belief that you blend so well that Dominicans would not know that you were a foreigner. Dominicans know when fellow Dominicans return to the DR after living abroad for an extended time, so they definitely know when a gringo is a gringo, regardless of color. Also, there is really no need to bring up color.