Yesterday I finished from Banyuls to L'hospitalet pres l'andorre, and I figured I would give an update. I have been following Joosten's guide in reverse, and have managed to keep up with his itinerary even when the reverse direction features significantly more uphill (although some foot-related injuries kept me stuck in Arles sur tech for a couple days).
Snow was not encountered until Pic de Carlit. There are two small snowfields you must cross to reach the peak from the lakes below. I used crampons since I am traveling solo and prefer safety, but they can be crossed without. Coming down the west side of Carlit was easy (despite being in a thunderstorm). There were only a couple small snow patches on the trail towards Estany de Lanos. I then headed north, and crossed the Coll de Coma d'anvell, which had significant snow cover at the top. From the Coll to just east of Refuge de Besines, some sort of traction is necessary (microspikes).
I expect a good amount of snow in the next portion of L'hospitalet to salardú, but we shall see.
Another item I thought id comment on is my success with the iPhone app IphiGénie. So far I have only used this for navigation, and it has been wonderful. That, and I scanned my Joosten guide, so I have no dead paper weight. I have brought along a Bushnell Bear Grylls SolarWrap Mini USB Charger, which can fully charge the iPhone with a full battery. One day of hiking with half a day of good sunshine managed to charge my iPhone from 1% to 35%. Although I haven't encountered long stretch without electricity, I am confident in the more wild settings I will be able to maintain battery life through the solar charger and efficient use of airplane mode.
I'll let you know more in a couple weeks.