I'm absolutely convinced it's because marathon alpha is live. Everything runs through or is linked to, budgie.net, it's why everything goes down during maintenance. I've noticed lots of in-game delay too, very miniscule but noticeable, since the alpha went live. I'm not saying they're exactly linked as such but maybe server space has been made smaller for destiny & 3rd party stuff to give marathon servers more stability. Remember the alpha is north America only, so likely running direct from bungie.