This. I did indoor skydiving at a vertical wind tunnel in Denver several years ago. It took quite a bit of practice (and cues from the instructor who was in there with me) before I was able to maintain a stable body orientation for any length of time.
To add to some of the good info that’s already been posted, a lot depends on the specific circumstances, or the assumptions you want to make about them. Best case scenario for our hypothetical novice is a conventional round parachute opened via static line. If the jumper exits correctly and manages to not get into a spin or tumble before the chute deploys, if the chute doesn’t malfunction, and if he doesn’t land someplace hazardous he’ll be just fine. Worst-case scenario is a high-performance (rectangular) chute which is harder for a beginner to control, having to deploy it manually, and being “pushed out by the instructor” which pretty much guarantees you’ll be spinning and tumbling (and screaming)! 
The proper body position for stability is one of the most important things beginners are taught.
So are the standard round ones, at least that I’ve ever seen. Don’t know about the military-issue WW 2 ones, but the round chutes used for sport jumping have vents at the rear whereby the escaping air imparts a small amount of forward speed. The trouble (for beginners) with the high-performance rectangular ones is that they’re basically wings that can achieve significant forward speeds, which is great for maneuverability but not so great if you don’t know what you’re doing and hit the ground that way.
Round canopies with vents are little more steerable, but not much- and are nothing compared to a ram-air canopy. You’re still going where the wind blows you, and it’s not a huge deal if you land going backwards. It’s preferable to land going forward in order to do a good PLF but you’ll probably be fine if you land backing up.
A ram-air canopy has a forward speed of 15-25 mph so you really want to land into the wind to help slow you down. Landing with a 10 mph wind means you’re going 25-35-mph. I’ve had some spectacular wipe-outs trying to run out a down-wind landing.
So I agree that our test subject is better off with a round parachute if he will be jumping without instruction. If he has a static line his chances of survival are very good, and he probably won’t get hurt too bad.
If he doesn’t have a static line and is responsible for opening his own parachute his odds of survival go way down. How much they go down depends on how his gear is set up. If he has a sport skydiver’s rig with a bottom-of-container mounted pilot chute his chances of finding the handle are not good. If he has a chest-mounted ripcord he has a fair chance of seeing the silver handle and pulling it, but he’ll probably be tumbling out of control, making it more difficult.
If he has an automatic opener it will deploy his reserve canopy but it could snag on an arm or leg. He will probably survive impact but could get hurt pretty bad.
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