I think that should be about right. But that does not necessarily indicate which stairwell they used, in my view.
In this
New York Times article from 1999, about the preparations for a potential Y2K-crisis, they have a graphic showing even more of the EOC, and were the different agencies were seated. According to the graphic NYCHA would be sitting in the east half of the operations room. I would guess that Jennings would go to his designated work station to make his telephone calls; likely having a telephone list there with numbers he needed, or numbers on speed dial(this taking place some time after the collapse of WTC 2, as I reasoned in an earlier post). And it also looks as though both doors leads out to the same corridor.
In the Dylan Avery and Jason Bermas interview it may sound like Hess was already outside looking for the stairs, while Jennings was making phone calls. I find it just as likely that they went for east stairwell, it would be close to both exits from the main room. There is also other reasons to assume that they went down the east stairwell, as I described in an earlier post:
For the use of the west stairwell see NIST NCSTAR 1-9 page 296. So that is my reasoning on this.