Hi, i'm from France, south France precisely, Toulouse.
I live in downtown with a 20-30 ms average ping, so I play a lot with UK and NL. Not that I care whom I play against, but I care if I am host (5 times out of ten..), because I will be insta-killed. I play sometimes with Spain, Italy, Germany, and most of the EU. When i play against other continents, it's mostly north and south america, and there is no survivors left, it's a massacre. You start the game, figure that you have the advantage, change your class to knife only, and you can dance around enemies, lie down and up again, they will never kill you. Or the exact opposite..
With my friends all around France, we came to this conclusion : The better the connection in terms of ping, the more you will be disadvantaged. When you host, you have 2 options : control the engagement to counter the lag effect (in other words, camp..), or quit the game because you'll lose every gunfights.
Another thing, internet in France is average. In some big cities, we have the fiber (5ms ping, 100/100mb, etc..), but it's not widespread because the ISPs don't really promote it (too expensive for them..), so almost eveybody who play online games have ADSL. With adsl it all depends on the location you live in. in remote areas, they have bad ping, and that can mean good lag compensation, meaning that some dudes are already prestige masters with a 5 K/D when you struggle with 1.3 K/D on prestige 2. Those guys are like actors in Holliday on Ice !! They ice-skate all over the maps and pwnd everyone !! I know a few guys with fiber, for the most part, they pown all the time, no effort. For a few guys, the game is useless online, they will never kill a guy with the proper amount of bullets. So what's the deal with connection?
I wish we could choose like BO1 the region we play in.
As for the UK playing a lot with the FR, I think the XBOX servers are based in the UK, right ? So, because BO2's matchmaking is based upon ping, and a UK guy right next to the servers has a 20 ms ping with them, and I, with the same ping, we could play together..And because there are a lot of FR guys with a good ping, we meet a lot of UK guys..
In the end, there is a final rule. When there's a guy beasting your lobby, check his prestige and ratio, it's almost everytime the biggest number in the lobby. Is it because he is better ? Please..
One final thought : Europe is considered as a small area for microsoft, that's why we don't have servers in several major countries, the third wheel of the world maybe..