Tis true. However, for some reason I have found more of them to be ISTJs in my experience. Much more so than any of the other types. Let's face it, ISTJs according to some online sites are characterized sometimes (annoyingly) by having depression, suicidal thoughts, etc.
Now regardless of how true that is or not I can see how an ISTJs thinking would deteriorate to that point. We tend to be critical of ourselves. We are strictly "just the facts" and tend to not rely on other peoples impressions or opinions of situations and just look upon our own. Often times we hold ourselves to to high a standard.
I have a saying; "If I've done it, it's not excellent, it's average."Maybe the depressed ISTJs take this to the next level DOWN. Most likely they let their normal thinking deteriorate so much that they are overly critical of themselves. Maybe it's because girls typically (and I stress that word) are more emotional than guys. Maybe not.
Hmm, I agree partially. I know that nothing I ever do is ever good enough in my eyes, and I shoot myself down before I even fail, while holding others to much lower standards. I won't listen to anyone who tells me anything positive about myself because I think it's all talk.
On the other hand, when I am very upset or on the verge of depression I won't make a big deal out of it. I'll carry on as normal although I'll be a bit quieter and avoid people more. Surely complaining about how miserable you are, wanting to kill yourself etc. etc. is more extraverted and probably more F than T. It's not particularly logical to make a big deal of it, and I remember being told when I was younger (I was concerned about a friend who threatened suicide) that those who shout the loudest about it are probably the least in danger of it.
How do you know these girls are ISTJs? I'd say they're attention-seeking, which doesn't fit the mould, and yes, very emotional. ISTJs, male or female, don't have emotional fits.
Perhaps ISTJs in general are characterised as 'depressed' because people don't understand us. Why on earth don't we giggle and jump on people when we're happy, or say a cheerful 'hello' to everyone we meet?? Oh, sorry, I must be depressed. Yes, that must be it.