One of the no-longer-brand-spanking-new Orange Line trains died at Mass. Ave. sometime before 8:30 this morning, causing the sorts of delays that made other trains just want to sit at stations, all grumpy and everything - and even after T workers did what they needed to do to get that train out of there, delays persisted until shortly before 10:30 a.m., when the T declared the Orange Line was back to normal.