I have sent an email to SINP, today, asking them if the applications sent to their international skilled worker category (500 applicants), on january 2nd, would make nominees eligible for the 600 points on express entry.
Just a few minutes ago (9:02pm here in Brazil) I've got an answer from them.
It was quite an automated email reply, and it didn't answer my question but, at least, I'm now 100% sure that my application made it into the 500 cap, as they acknowledged that the app was indeed submitted correctly and will be reviewed.
See link below for the content of the message (blurred my personal information on it).
http://i.imgur.com/GtvZwzB.png
One information on it left me really worried though. It says my app was received on january 2nd, 2014!!!! Not 2015, but 14.
I've already contacted them back, questioning them about the date.