I just came back from Parris Island and I'm pretty suprised how much easier it was than I expected. I mean I was not even that good of a recruit I constantly got quarterdecked so yeah it was a tough mentally but physically it was easy as hell. I was expecting it to make me extremely physically fit but the only real improvements I made was from doing pullups or whatever else in my own freetime, the PT that they made us do there was really not that hard and after first phase we barely PT'd anymore.
In fact there were people who did exactly 3 pullups, 60 crunches in 2 minutes, and ran 3 miles in like 25 minutes and they're going to be infantry.
The Crucible was supposed to be the big test in the end that everyone who'd been slipping through the cracks and barely making it would get weeded out but it turned out to be overrated. Yes it was tough because it was cold and we were in wet clothes for like two days and a lot of people fucked up their feet with blisters but physically it wasn't that tough. Plus we got 4 MREs I heard it used to be only 2. And I'm pretty sure we got more sleep than they used to give us.
All the DI's there blamed "mother's of america" for making it so easy I don't know if that's an actual organization or whatever but these mothers must have thought that they were helping us but all they did was screw us. I'm not infantry so I don't really know about the training at ITB but I hope for our country's sake that its tough as hell because some people who graduated and are going to ITB are just not physically ready for combat.