Doesn't appear to be, but there are always exceptions, but I have also logged a lot of hours on that poor thing, including downloading over a terabyte of data. YMMV
Profiles? I think that's only XBL? Or do you mean you have four user accounts, but you only have a PSN account for one of them? That's odd. Just out of curiosity, if that is the case, why do you have user accounts without PSN accounts?
You might be surprised, I certainly was. As I recall, I even have one file in the Game Data Utility folder that is over 4GB!
You don't have to delete them to determine how much disc space they use. Just highlight them and press triangle, and for most files they say exactly how much disc space they use.
If you are talking about comparing the same downloadable games, then both XBLA and PSN games use almost identical amount of space.
If you are talking about disc based games, most games do not require installation, and thus most only use the HDD to save games on, which are VERY small files as you have already discovered.
It is true that some PS3 games require that they be installed to your HDD before playing them, but there are advantages to that. When the whole "forced install" controversy came up, tests showed that the same game played on a 360 off the disc had significantly longer load times during the game than when played off the HDD.
It's because of this many people wish that all games gave us the option to install the game.
Actually, unlike other consoles, they give a lot more detailed information about the files on the HDD, including disc space, it's just some folks don't bother to learn all the things they can do with their PS3. Granted, for those that are using a hacked 360, they can get a lot of disc information... just don't let MS know.
Which is another thing to be grateful for, because unlike the other consoles, at least with a PS3 they allow you to use any SATA drive you like. In fact, if you really wanted to you can bypass using an internal hard drive, and use a SATA extender to be able to use an external drive as the PS3 HDD, thus allowing you to have 2TB HDD if that's what you want.
It's certainly possible that the reason your 360 doesn't "eat up" space is that maybe it just doesn't do as much as your PS3, or have as many features.
You're very welcome, and thanks. It looks like it's not going to cost much to fix, maybe as little as $45, so I'm not too concerned.
I may also just use this as an excuse to get the new slim model that just came out. With the 45nm CPU and 40nm GPU, it is probably very quiet. Besides, as much use as our PS3 gets, it is probably a good idea that we get a second one, because between my wife using Home a lot more, and my kids getting older and playing games, I'm not getting to use it myself as often as I would like.