I looked everything over and I am going to conclude that all gates (including the one on E deck) prior to the collision were locked. I based my decision on the Immigration Law (slide 7), "Stephenson par. 7; Wade 22 "Immigration Laws required LOCKED barriers on immigrant ships to prevent the spread of disease." The key word here is LOCKED, as in LOCKED barriers, not unlocked ones. The crew had a job to do and part of that meant gates were to be kept locked at all times. White Star was no run-of-the-mill shipping firm so I trust they followed regulation firmly. Also, it is mentioned in various places that crew had to UNLOCK the gates to let 3rd Class passengers out. This indicates the gates were initially locked. (Pellegrino mentions locked gates as well, on page 71 of "Ghosts of the Titanic," "What they did not know, could not have known, was that historians of the future were launching robots deep into the Titanic's bow and finding those murderous gates still locked -- just as Anna Sjoblom and Emily Badman and Rosa Abbott said they had last seen them, on that cold, dark morning." I do not know which dive Pellegrino was referring to, had to have been an early one as his book was written in 2000, but I hope to have this data soon.)
Why there is a gate placed on E deck I will never know. From slide 9 I could not make out that the classes were segregated horizontally or vertically by this gate, so what was its purpose?
As far as the gate on E deck and whether IT was locked or not at the time of the sinking -- again I am going to have to say that it WAS locked due to the regulation, but whether men died from being locked in or if they were killed nearly instantaneously from the onrush of water as a result of the iceberg I do not know. I am aware though that flooding came quickly since this part of the ship was closest to the damage.
My personal opinion on the great loss of 3rd Class life was that the crew loaded 1st Class first, and by the time they were ready to load 3rd Class the ship was 3/4 well into the sinking and time ran out. They managed to save about 100 (3rd Class) women, but there were still approximately 130 (3rd Class) women left who did NOT get saved. And honestly, if the crew wanted to load women first they would have if they could have. My first thought was that these 130 women who lost their lives were in the forward part of the ship on E deck and got killed almost instantly by the force of the iceberg damage, but then I remembered that it has been said that single men were placed in that part of the ship and what would women be doing there. Because that part of the ship belonged to single men, I was forced to conclude that loading time for the remainder of the women ran out. I am not sure if there is any relevance or importance to this but I noticed the 3rd Class did not start getting substantially loaded until Boat #16, and may I comment that it was quite remarkable that the crew were able to detain all those 3rd Class people while loading the 1st Class. They detained somewhere in the vicinity of 800-900 people (I estimated the figure), because that is how many 3rd Class Passengers there was. That's a lot of people to contain in just one hour.
P.S. I could see now, why Mr. Luigi Finoli was angered. Locked or not, how would you feel if you were detained and prevented from boarding a lifeboat on a sinking ship, that you had to sit idly by while hundreds of 1st Class people strolled by climbing into a lifeboat? (and I do not think every single 3rd Class person was down below, I am sure there were plenty who escaped their quarters to watch the 1st Class load)