I'm willing to give SE the benefit of the doubt to say that 0.3s interval is an industry norm, as opposed to say the industry norm is 0.1 and they somehow thought 0.3 was going to cut it. Either way, either the 0.3 is an industry norm but SE somehow managed to fail at something no other MMORPG did, or 0.3 is not an industry norm and for some unknown reason SE thought it was going to work.