Chapter titles HBP

[mooseming]

I've been in bed with a horrible cold and somewhat at a loose end so 
surrounded by my HP books I decided to look at the structure of the 
books with a view to the chapter titles JKR has released for HBP.

2 Spinners End
6 Draco's Detour
14 Felix Felicis

The published titles all have a consistent form given their length. 
The first three books are much shorter than the 4th and 5th 
averaging 19 chapters at 14 pages, the longer books have more 
chapters which are only slightly longer, 37.5 at  18.5 pages. HBP is 
also a longer book so should have the same number of chapters unless 
JKR changes her style dramatically.

Events in the books take place at approximately the same chapter 
given the total length.

Leaving Privet Drive occurs in chapters 3,3,3,4,3
Travelling to school occurs in chapters 6,5,5,11,10
First DADA class occurs in chapters 8,6,7,14,12

So for HBP chapter 2 `Spinners End' could be the place Harry goes on 
leaving Privet Drive (as JKR says this is his shortest stay yet). It 
sounds like a place to me possibly Luna or Neville's home. Could it 
be near GH?

Chapter 6 `Draco's Detour' looks likely to occur before travelling 
to school for the start of term.  Which is interesting as the books 
are written from Harry's pov so how would he know? 

Chapter 14 is most likely the first DADA class and so Felix is 
probably the new teacher.
(DADA teacher's name is a chapter title in CoS, GoF,  OotP)

Pointless speculation I know but it passes the time.

Regards
Jo