arildno said:
But I wonder about the usage of "whilst" in its comparative connotation as well, like:
"I'm tall, whilst my girl-friend is short".
To me, this sounds a bit archaic..
Is it?
There is no comparative connotation, at least not in addition to 'while.' Both words have exactly the same meaning. I explained the etymology back on the first page, and technically, 'whilst' is a modification of the adverb form of 'while.' To do something "whilst" is basically equivalent to saying that you're doing it nonchalantly, carefreely, idly. Somewhere along the way, this correct usage was abandoned and the word became equivalent to any form of 'while.'
If you want to be really exacting, both words are archaic, and 'while' might be considered even more archaic, as it's maintained the same meaning since Old English.
To the Hombre - Of course 'while' can be used to contrast. What I meant in saying that 'although' or 'yet' would be the more correct words is that they can only be used to contrast. Using those words instead of 'while' takes the ambiguity out of the sentence, and gets rid of the need for qualifiers. Take the earlier sentence you posted:
"My twin brother eats donuts for breakfast while I, on the other hand, eat them for lunch."
It is necessary to add in 'on the other hand' because otherwise the sentence is ambiguous. You might be contrasting your eating habits with your brother's, or you might be saying that you eat lunch at the same time he eats breakfast. There is nothing in the word 'while' itself that can tell us the difference. You can simply say:
"My twin brother eats donuts for breakfast, whereas I eat them for lunch."
In this case, 'whereas' is a better word to use than 'while.' Though both are correct, 'whereas' is more precise.