Well, Blood Elves never leaved Quel'Thalas (forget about Kael elves), such as High Elves, however, even if he were far away, they're still loyal to Kael, who sends the 'ability' to drain fel magic to survive. When the name Blood Elves was just an homage to the fallen elves, Vereesa and the others were also considered Blood Elves (that would make more sense to me, honestly), but when they began to consume fel magic, some of them refused and leaved Quel'Thalas (they're actually forced to...), and renaming themselves back to High Elves. So the High Elves found their home in Dalaran and some minor lodges all over Eastern Kingdoms, leaving Quel'Thalas fully for the Blood Elves, who later fought against the Scourge to retake Silvermoon.
So yes, I think it's fair that the Blood Elves, who fought and died to retake the fallen city, stay in Silvermoon. The High Elves were just ... "quiet".