A God-tier beast like that should have no problems whatsoever with D2 (or almost any modern-era game that I can think of, really), barring client/server latency and/or connection problems, which obviously isn't a client-side fault. Yeah, this is 100% Bungie's screw-up, and 100% their obligation to fix it, ASAP. The campaigns [i]that we -blam!-ing paid for[/i] can easily be rendered completely un-playable because of this.