What if you knew the depth of the mail queue of the person to whom you were writing, before you wrote the e-mail? E.g., you are writing an e-mail to your boss,

What if you knew the depth of the mail queue of the person to whom you were writing, before you wrote the e-mail? E.g., you are writing an e-mail to your boss, and when you start writing, you see that he or she has 150 unread e-mails. Might you change your mind and decide that it either 1.) wasn't that important after all, or 2.) important enough to relay the message in person or on the phone?