Okay, I'm struggling with something that seems really simple.
Although every effort is made to deliver orders by the requested date, we cannot guarantee delivery in less than 2 business days
I'm the one who rejoiced when the supermarket changed its signs to read "12 items or fewer," so it's not that I don't know the difference between fewer and less.
But I'm considering "2 business days" as a block, not as two countable days (since it could be four days if there is a weekend in the middle) and think that "less than" works. I think that "under" is too informal. I think that "in fewer than" just sound odd in this case.
Am I losing my marbles? (Please, American experts - this is a local thing that doesn't need to work world-wide.)
Thanks guys!