We will also never know if the opposite is true as we can't go back in time and see the opposite happen. Also the variables are many and it is not just about number of units and country's to launch in, it is also about demand, strength of your brand, marketing, investing in markets that have a potential to be big players in the future.
Few more things to contemplate:
1) if it is worth launching in those few extra countries due to demand, is it still wrong?
2) to be able to make a powerful statement saying we are better prepared than our competitor and this is why we can serve gamers everywhere sooner wrong to?
3) did they ship large enough numbers to the smaller launch countries to really make such a difference? Eg if those countries only got 1000-5000 units each, compared to the UK and USA getting 10k-50k each.
4) having sold sooner rather than later in emerging markets or smaller markets could have led to an increase in sell through to customers due to hype generated at launch. Would that still be considered a negative?
There are many variables and like you said all we have are opinions. I guess we will never know until Doc Brown does his business