JKR Chat - What was not said - I - Harry's Departure from Privet Drive

[samnanya]

No: HPFGUIDX 92162

Adele - Will poor Harry be stuck at the Dursley's all next summer
JKR - Not all summer, no. In fact, he has the shortest stay in Privet 
Drive so far.

Samnanya
Which to me means that he must leave before his 16th birthday (In SS 
he leaves with Dursleys 2 days before his 11th Birthday)
Hmmmm wonder WHY he leaves and abandons protection that staying in 
Privet Drive provides, especially considering that the Second War has 
begun.  
Of course this will get Book Six off to a rocking start long before 
the next Hogwarts term begins....
I also was intrigued that neither Luna Lovegood nor the twins came up 
at all in the interview. I have always felt that Luna will be very 
VERY significant in book 6 - especially considering that she is still 
probably at Hogwarts at the start of the summer {would love to see 
JKR's answer to that one...)