I dunno, I don't think he meant "three."

The :3 emoticon sometimes means "a dog" (if the eyes are on top), and sometimes means "a guy wearing a chef's hat" (if the eyes are on the bottom).

So, time delta :3 could mean "the time you'd rather spend playing with a dog," or it could mean "the time it takes to make a nice meal." It's more than three either way. And not worth installing Windows when you could use that time petting a dog.