Yeah, eddie plays those symetrical fingerings in standard tuning, like aiwass said, certian notes will sound out of key and create tension. Most of these runs will be played very fast so that the tension note aren't left to ring out.

Eddie also likes to change up the order of the patterns. So for ex on the ist str. he may play 12 14 15 12 14/ 2nd str.12 15 14 12 15