Umm, IIRC, the answer is 'no' and "yes". Or is that 'yes' and "no"??
Check the manual, but I think it'll only matter if type cast is important, i.e. if you want an integer value rather than a string, [for example], don't use
setcookie("foo", "1");
//instead use
setcookie("foo", 1);
Like I said, check up on this, it's really been a while....