Back in may 2012, the 3DS crossed the 6 million mark in Japan some 13 weeks more than the original DS. Now that the new 3DS XL has been selling like crazy for three steady weeks, the system has passed the 7 million mark, which gives us the perfect excuse for a new sales comparison between the actual systems…
The only unknown factor is the holidays really, and I'd guess the 3DS will do extremely well during this period.
Although none of this means that it won't sell well, it just means that no analyst thinks it well sell as well as the DS has, which is starting plateau.