Harry's Patronus

[lady_galadriel14]

No: HPFGUIDX 113059

I was re-reading PoA and noticed an inconsistency. At the end of 
PoA, Dumbledore says something to Harry about the unusual form his 
Patronus took when it charged down Malfoy at the Quidditch match, 
and made the comment that Prongs rode again. Obviously this means 
Harry's Patronus was clearly a stag. Why then, at the end of the 
book, did Hermione seem so surprised and impressed to find out that 
Harry could produce a Patronus? Also, in the meeting at the Hog's 
Head in OotP, everyone present is shocked that Harry can produce a 
corporeal Patronus. Wouldn't most, if not all, of these people have 
been at that Quidditch match and seen what happened? It's hard to 
believe no one would have noticed, even if they didn't happen to be 
watching Harry at that moment. I think a gigantic bright silver 
shape charging someone down would catch your eye.

"lady_galadriel14"