is anybody considering a heavy jungle start?
I tried it, but didn't finish it. The problem with my location was that I was just on one end of the map and everybody else on the other, giving me little chance to find CS and spread religion. To get my prophets and missionaries to the AIs and CS, I had to cross half a map full of barbarians.
A key difference that applies to probably all jungle starts was production: Whereas with desert start after Petra I could build anything I wanted in hardly any time, despite having a marble plains nearby I struggled to even get the stuff I needed in the jungle.
The culture gained from jungle via religion was not worth it. It gave a boost in the beginning, but the lower production made it close to even with desert towards the last third. It didn't really seem to give much of an advantage, except that popping an early culture ruin is perhaps not so important. This might be different if somehow you managed to get decent production for woders going despite the jungle.
One thing that really suprised me was the lack of money. This was probably partially related to not being able to spread religion on the map I had. I do believe though, that a large factor also was that I couldn't easily build bank, stock exchange and wonders that would have increased my gpt. This allowed me to have only very few RAs throughout the game, slowing my research down despite the jungle beakers.
The faith problem also relates to the lack of production. However, I do think you can get enough for two scientists if you have a couple of religious CS as friends.
What suprised me was population. I had 4 bananas and 2 citrus in my city circle and my early pop was much better than in a desert start. However, by the last third of the game, I was behind compared to what I would usually have from a solid desert start with petra.
In summary I think jungle may be a close second best. But desert certainly seemed better.