UPDATE - It seems this info comes from one specific retailer, which certainly helps put things into perspective.
media create numbers are this week, but Fire Emblem Fates sold better than Awakening, new shipments are selling out, Nohr is more popular— Ｂｕｙ ☆ Ｋｉｓｅｋｉ！ (@CureVylash) June 29, 2015
slight addition to this, Nohr was more popular on the first day, Hoshido caught up on the next day and now both versions are gone— Ｂｕｙ ☆ Ｋｉｓｅｋｉ！ (@CureVylash) June 29, 2015
We won't know official numbers until Wednesday, but it sure would be nice to see the Fire Emblem series continuing to gain in popularity! Thanks to VGAMER for the heads up.