All three of these companies are built on a foundation of a bunch of users frantically sharing lots of content with each other, as fast as possible, for free; the result is something that may or may not actually have any value at all, despite insanely high valuations from investments and acquisitions.
In a way, the question of whether these companies are even "successful" at all is actually an important one to consider: they aren't terribly profitable (or are even operating at a loss) and, like many other Web 2.0 companies, are being held up by a promise that "with this many users, we will make money".
Yet, even when you reach the size of these companies--Facebook and Twitter are both larger than the entire possible network connected market in 1998 when these dreams were so horribly vivid--you still are in a horrible position of "ok, but how do we make money? we were told there was money :(".
Now, I'm not from Europe, but I get the impression talking with some people I know from there (who may just be biased or romanticizing) that this sort of insanity simply doesn't play as well in that market: that people think through their monetary decisions a little longer, and are less likely to be tricked.
Meanwhile, people in Europe really do seem to care more about information retention issues, and have passed numerous laws (sometimes ones that people consider quite over-the-top) that indicate a mindset in opposition to this "share everything about you as fast as possible so it can be monetized" concept.
So, if you are wording your statement or in any way reacting to this premise from a "how dare you insult other countries like that" mentality, you might should attempt to recast the position as "what about these other countries makes them better than us and less likely to waste their time building these things?".
(The same argument applies to the other example: many people consider the ideals that lead to Hollywood to be founded on a combination of narcism and rent-seeking; a ton of people go there and spend their lives in pursuit of something that will never work out for them, slowly violating more and more of their personal morals and boundaries in the hope of getting a little closer to their dream.)