Again, that is just not a "nice" number for a financial analyst. Once you get to certain thresholds, like 100 million, then you only report in big round numbers like 10, 20, 30 - unless you really need show progress or something (like, at the last milestone you said 130 million, and now it's three months later and you are only at 136, then you say 135+ so it still looks good).
Like I said, Xbox could be anywhere from 42 to 51 million. I bet VG Chartz is actually really close.
I really don't understand your logic. It's not about having a nice number. Do u think AMD will ignore hundreds of millions of sales from the range you propsed in a financial report to have a nice number?
The way I look at it is the + sign is a very close number to reported number. So at minimum it would be 151m and max would be 154m, otherwise, they could say 155m+.
Besed on max number, xbox sold to consumer would be estimated around 41-42 Million's.