I don't know that I trust Anet's visible metrics at all. Dead empty worlds are listed at medium, and so are worlds like FC, which is definitely not empty. Obviously activity varies a great deal between timezones but still...different servers with the same listed populations are dramatically different with actual populations. It would be far more honest if they ever actually listed servers as low population. As for BG, they're just hibergating trying to open again. The usual manipulation. Anet will cave, open BG, and suddenly they'll be at the top of T1 again.