Maybe, because there are 3 main factors that will determine this:
1) Supply - At the current rate, 10M is impossible: 600K/month * 5 months = 3M; 3M + 4.7M = 7.7M. In essence, they would need to double their supply rate and maintain global demand. That's asking a lot.
2) Demand - With the current supply constraints, no reliable demand can be established. The Switch is readily available in Europe now, but very limited in JPN, USA, and CA. If the polls I've run on here are any indication, Nintendo has only met about 72% of our demand (Up only 5% on the month before, and flat from June to July). It could be that demand is met by December, we overreport as more likely early adopters, 6.6M is total demand, etc. I think next week's poll will be very telling and that I should have done my poll with regional breakdowns.
3) XB1X - Preorders start any day now, and MS could (probably won't) steal the holiday thunder, which could hamper the Y17 Switch sales.