COS - Hermione didn't face the Boggart. Meaning?

[rowanbrookt]

No: HPFGUIDX 130793

I have been reading COS again and realised that in Lupin's Boggart 
lesson Harry isn't the only one not to face the Boggart.  Lupin 
purposly lets every pupil but Harry experience the Boggart, but now I 
realise he also didn't let Hermione have a go.

Ron teases her that her most frightening thing ever would be a homework 
that only got 9/10, but I wonder if JKR will return to the fact that 
Hermione didn't face the Boggart in a later book.  Maybe Lupin knows 
something about Hermione's past that hasn't been reveiled in the books. 
After all, we know very little about Hermione's home life.  Maybe 
Hermione will play a much bigger part, other than Harry's friend, or 
maybe she has suffered in some way.

What do you think?