Birthday Stats

I received 80 “Happy Birthdays” on Facebook of some form or another.  Here are my stats on it:

“Happy Birthday” with no mention of name: 25
“Happy Birthday” followed by name, no comma: 30
“Happy Birthday” followed by name, comma:  9
Other: 20

Longest Streak: 9 people in a row wrote “Happy Birthday Terry”.
Likelihood of a Post before 3 AM using a comma correctly:  39%
Likelihood of a post after 3 AM using a comma correctly:  9%

Likelihood that a post method would be followed with the same post method: 38% (28% predicted by random chance).

I wonder how these stats would change from wall to wall.