60,000 pre-orders for a completely unknown company months before launch is not small. Usually they sell more once the thing is actually in stores, and they already have the best kind of marketing they can get, hype and people putting dollars into it before a physical product exists.
Yes, the big console makers sell that many every week, but they are not a big console maker, so they don't need lots of numbers to sustain themselves, that's what growth is for, and they are showing better indications of it then Nintendo or Sony when they first got on the market, assuming they actually deliver the product they will see more. and their price point puts them in closer competition to a PS2 or Roku.