I reckon they will mention how many units they sold at PSX, regardless if they sold 34 mil, more or less.

No. they will wait until the holidays are over an announce a new number. why announce new numbers right before the biggest few weeks in the holidays, and right before the temp price cut in the USA.

Last year it was:
Shipped milestone after Q3 2014. Then, sold through at the end of 2014. Nothing between.

So, after getting the November milestone, they will give nothing until end of the year sold through.
At PSX they will either not mention sales again or simply repeat the previous 30.2M milestone.

Counting the hours till psx

On the one hand yes and on the other no, they can really show of by doing so at Playstation Experience or they can wait for December sales numbers if they are feeling humble...

3.8m units in 2 weeks... No.

They just had an announcement, and there's no way they sold that much by then either.

I don't know why but I thought they'd announced the 'more than 30.2m PS4s sold' on the 14th of Nov. Oh well, I'm still sticking with it!

No.

They will announce 35 million PS4 sold!

You guys are forgetting digital sales, duh. That's how it hit 34m sold.