well, she was due, so it could have been any day around now, so not really a great surprise, and you have only two choices for guessing the sex, so not a great feat to have guessed a boy.
had she not known she was preggers or had kept it a secret from the world and you dreamt this and then it happened i'd say WOW but dreaming that a pregnant woman has a baby is not really unusual
had you correctly dreamt the name, jailynn - very unusual - i would be impressed, as she has made it up, but guessing one of the most common names in the world - and it was wrong, well...
having said that, come back if you have any dreams about numbers...