We can say for sure that real people in the project are about two times less than active nodes now. As long as it is possible to have two nodes for one person, nothing will change.
No... we can't say that for sure because IDENA economy rewards you for high score which is impossible to get validating 2 nodes. It's better to have 1 good node than 2 shitty with high risk of failing validation on one of them. Majority of people that i've spoke has 1 node per 1 person.
How many nodes are currently running right now?
I mean REAL nodes

We will see after validation ceremony. From what i've seen this detected farm is far less than 700 nodes (more like 400-500) but it can be not the only one.
What really happend (by @ozh_v):
https://t.me/idena_trading/31585