1.) Anytime it's usually random I've only pvp and that's when I experience it usually sometimes in towns
2.) Myth but happens on any of my toons
3.) iPad 1 and iPhone 4
4.) varys
5.) usually when I try and fight people or even if I just stand around I lag still with green ping
6.) few weeks after the cap came out and when the pocket legends threads started about lag
7.) I only ever play in wifi and it's usually fine until recently

Think that's covered what you asked for