In most cases, a five-minute lag between a public "Will you marry me?" and a public "Yes" would be kind of awkward. But this is not (yet) a normal situation; as you can see, some guy with the initials D.D. used Facebook to pop the big question to a woman known only as Breeze. This is the future, kiddos.
It appears that both the question and answer were delivered via cell phone, possibly while taking shits (you can't confirm otherwise!). Although if these were some seriously savvy lovers, their engagement would've occurred via iPad, maybe even from the same room.
Anywho, congrats, you modern lovers!