Flags at Half Staff, equal treatment by the President?

I'm not sure President Bush is treating disaster victims the same when it comes to his most noble duty of ordering, by proclamation apparently, that flags be flown at half staff.

For the recent shoots at Virginia Tech University and September 11, 2001, the President ordered flags flown at half staff in about 24 hours.

It took the president six days to issue a similar proclamation after Hurricane Katrina hit the Gulf Coast eventually claiming over 1,800 deaths.

Here are the differences:
Incident

.....................Days to issue.............Days to issue
.....................proclamation.............'Day of Remembrance'
Virginia Tech............1.......................N/A
Katrina..................6.......................10
September 11.............1.......................2