Fair point, I'm just recalling comments made by Ryan Drummond, who was describing the voice acting process of Sonic Adventure, they (or at least the casting director) pretty much had them do it one take with no context. But really, it is no worse than other voice acting work that came out at that time (I guess whatever fits their narrative).
Speaking of stereotypical accents, boy MGS had them with Naomi and Mei Ling...I think they were phased out when Kojima wanted to come off less cheesy.