The article talks about four pilots being trained, three for captain of the ERJ, one for FO of the 737. States some hours, and other information.
The information in the article about the suit makes it sound like four pilots are being trained, however the pilots I've spoken to have between 300 and 500 TT, and are all being trained for FO on the ERJ.
What's my point?
There are more than four being trained.