Well, the UK is probably closer to the US than to Continental Europe. I live in Austria and the Situation here is comparable to Germany (although we get the games uncut^^). In Austria Video Games are often regarded negative because of violent content (killer games are commonly seen as the reason why young people run amok). People older than 40 are often strict enemys of gaming and do not like their children to play for hours. Nintendo is often the better choice for the children because there are more games suited for them. Thats (one of many reasons) why the DS is such a success. Some Kids already get them as early as when they start with the Kindergarten.
If you go to a Saturn Store, you can see the difference how PS3/X360 and the Wii are marketed. I gave it up, because I couldn't find suitable Wii Games for me amongst all the crap games (shovelware). I only buy them online now.
The other main target group are people, who grew up with the NES and the SNES and like the main game series. Nintendo has a core following because of Mario and Zelda games.
The Wii is also marketed as entry console for Non-Gamers (a friend of mine went to Saturn to buy a console and he was advised to buy a wii instead of a PS3, because the games are easier to play.).
I own a Wii for a year now and got my PS3 1 month after its launch. My reasons for buying the Wii were the Virtual Console (for all the Nes and SNES classics), its B/C to the Gamecube (i didn't buy one) and to play the Mario and Zelda Games (Wii and the N64/GC via Virtual Console). But to say the thruth, I am pretty disappointed with the Wii. Wii sports is such a bad game, it only entertained us for 3 hours. I got Wii play only because of the Wii Remote Bundle, and that Game is also only average and we did'nt play it any longer after 3 days. I simply cannot understand, why people make so much buzz about how well they sell. They are simple tech demos and are not worth mentioned compared to all the High Profile Games. I mean, nobody goes crazy because Minesweeper, Solitaire and Freecell are selling millions...
I do not like the Motion Controls. I got Eyetoy Play 1-3 Years ago and they got pretty boring soon, too. It is so silly (in my opinion), to waggle the controller in Fifa to shoot. There are to few buttons, etc.
The 3rd Party support is also pretty lame. Konami, Capcom and Square-Enix are bringing their flagship Games to the PS3. Maybe i am wrong, but it seems that the wii is getting the PS2 version often and the PS3 and 360 get the better (or HD) version of the game.
I got games like Metal Gear Solid 4, GTA 4, Resident Evil 5, Devil May Cry 4, Final Fantasy XIII, Tekken 6 etc. for the PS3 (successors of some of the biggest PS2 Hits in Continental Europe), but the Wii is NOT getting them. That is maybe what is hurting the Wii the most. And that is why the PS3 is so strong in Continental Europe (UK is a different story, but that are cultural differences (Anglo-America vs. Continenal Europe).
I am not saying, that there are no good games for the Wii. Only, that nearly all the big franchises of the last Gen are on the PS3 and will probably stay there in the future. It somehow hurts me (metaphorically), that high profile Games like FF CC sold pretty bad and such simple Games like Wii Play, Wii Sports, Wii Fit or Let's Dance are seen as reference Titles for the Wii (among many others), when they are nothing more than a collection of mini games. And you go to the Saturn and have to look for the complex Games somewhere hiding below a stack of simple Games (ok, now I am going drama, but I you know what I mean).
It seems to me, that the PS3 is in for a strong year in continental Europe this year (finally FF XIII is out!) and the wii, though having good sales and all, will still see the same Games in the top ten (Wii xxxx and NSMB Wii) and complex games having a hard time. But since there is not much choice, they will sell eventually.