Okay I finally realised where the ISTJ comes from... Tangent and a half of this thread goes to Mr Wildcat for introducing financial psychology
As for this self recrimination reflex and promising the world oblivious (or in denial) of ability to deliver problem.... how do "balanced" ENFPs do it? Surely this is not something which is just there and nothing can be done about it, that'd be well... a bugger.
I'd think that it could be similar to some of the deeper problems with other types, just played out as only ENFPs seem able to do with more colours than an HDTV and more artistic licence than a cubist convention. I'm just kinda hoping that this stumbling block is alleviated somehow. Present theories run that ENFPs would learn best from INFJs and should aim to learn some ISTJ (yes Dom THAT again

just think how useful Matt's ability to recall minutia from years ago would be to a historian!! Just leave the accident prone nature and lack of social skills okay

)
So anyway, yes the theory in the OP does rely on being able to get answers in specific and in that regard is quite a T response. However, as was pointed out to me, it is often at these points when someone should step in and assist in objectifying (is that a word?) the situation. I have similar problems when everything is confusing somedays or when I can't face a large task or something. That's when some bright spark comes in and sets out step one, step two and so on. I don't beat them over the head whilst yelling "I'M A P. YOU SUCK!!!" even though sometimes it comes close. As such I'm thinking of this approach as more a counter to the ENFPs emotional reaction and withdrawl, not a parallel.
I have been beaten over the head before for this kind of thinking but I've seen time and time again that at tome point the problem needs to be solved and not just sympathised with. As to when this point arrives is a mystery to me most days. Oh and if the problem doesn't want solving (ie the person is somehow protective of having it) then that's when you say "STFU and quit dragging me down with yer whinging!" (not like that but that's the general thrust).
As a last point (N kicking in to a higher gear) I'd like to point out that this thread is not directed at anyone in particular and nor is it about anyone in particular. Just incase I'm teasing anyone's paranoia.