Just because you're too ignorant and lazy to walk around looking at all the construction doesn't mean it's not there. There are over 4000 units actively under construction right now. That is a fact beyond argument.
I've been in plenty of places like SF, which, when under pressure, simply make up statistics or change what they mean.
It's simply not a "fact beyond argument", when the only source of this "fact" are a group with a very strong vested interested in high numbers and a history of not truth telling.
The 100-200 units number only came out after a lot of pushing.
They claim there are 22,000 units in planning/approval as of 2012, and we are 3/4 of the way through 2013.
Combined with the 4000 that were under construction, they should be visible by now somewhere.
Maybe you'd like to point out where you see 20k+ units under construction?
At that many, it should be blindingly obvious. SF is simply not that large, and does not have that much hidden space (open or otherwise).
I'm sorry that you don't know what it means for construction to be approved. It means the units will be built in the future. This isn't Sim City.
If you are feeling exceptionally lazy and only have time to look outside your bubble once, go to Market between 7th and 9th. The new building on 8th between Market and Mission has over 1900 units (over 1400 units net of what were demolished) and the one at 55 9th Street has 300 new units on what used to be an empty field.
You seem to be deliberately misrepresenting what i'm saying in order to argue about things i'm not claiming, so i'm just not going to continue this discussion.