Delimited formats performance can be exceptional, they can also be phenomenally terse and avoid the string tarpits of CSV and TSV if you just use these unicode characters.
Those are not the unit/record/group separator characters! Those are the graphical symbols for the unit/record/group separator codes. The actual unit/record/group separator codes are in ASCII, as 'tremon' writes in a sibling comment.
I guess I shouldn't post comments when I'm terribly hungover. The fact remains, use those seperators, most developers don't even seem aware of them to any degree.