I've spent 3 weeks in total during 2 trips to Egypt a few years ago. I've managed to kite about 2 hours altogether on my 12m at the time.
Been to El Tur for 1 week. Had 45 minutes of pumping the 12m in about 10-13kn winds. Luckily there was a rescue boat there too! The only time in my kiting endeavours that I needed a rescue boat!

It was the first week of November 2008.
Been to Hurghada for 2 weeks and had about 1h 15min during that period after a 2 nights driving to/from Cairo. And about 40 degrees second half of September 2010.
Been to the pyramids and I'm happy to say I'm never going again anywhere near there.
A few of my friends go regularly and regularly have good kiting conditions.