The EU is large and most importantly very diverse. Pretty much all the West and South of Europe has a very strong small talk culture. You shall not stereotype a country, and even less so a political and economical union of countries.
And within those regions it differs a lot too. Here in a big Spanish city you would find very little too, especially in summer when there's so many tourists.
The US is larger than Europe and importantly very diverse, a melting pot you could say. You will find people in the South are far more talkative than people in the Northwest. The “Seattle Freeze” is real and I believe that it does not exist to the same extent in the South.