Uptight, surely, there are plenty of pockets of uptight cultures in Europe, even more in their largest cities. I consider Stockholm uptight as fuck but on the other hand I'd say that Malmö is pretty relaxed.
Using Europe as a single, homogeneous thing is the same mistake as calling the USA a homogeneous culture. There are traces of culture in both places that are quite orthogonal across many regions but there's so many regional differences that it becomes irrelevant.