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Hiku said:
Aura7541 said:

It looks like that person got that percentage from dividing XB1's NPD LTD numbers by the quantity of EA's install base estimate minus Sony's PS4 sell-through numbers. It's already established that subtracting the PS4's sell-through numbers from EA's estimate is not an accurate way of finding out the XB1's WW sales. Last time I checked, the US made out around 60% of the XB1's total sales. A jump from 60% to 70% is hard to believe, in my opinion.

Any idea how EA determine the install base? If one person buys a PS4 Slim and then a PS4 Pro, does that count as 1 or 2 units to them?

There are two possible scenarios. Zhuge mentioned that EA has left out Japanese sales in the past. If you subtract the PS4's sell-through sans Japan sales from EA's estimate, then the XB1's sales is close to 35m.

Or EA is actually trying to estimate the actual number of systems in homes. IIRC, Sony mentioned that about 50% of the Pro's sales are upgrade purchases, meaning only half of the Pro's sales add to the install base.