I'd actually say that the English most Europeans learn is very compatible with British English, and I very, very rarely struggle to understand them. However I do quite regularly cause issues when speaking with Americans, as the difference between our dialects is quite large; the British in general have a very diverse array of accents and colloquialisms, and we tend to speak pretty quickly in comparison to the US (per…
That definitely can be the case, also I observed intermitting slow and very fast speeds in the same sentence in order to put the emphasis in different parts of the sentence.