I would say that any structured course from a good instructor is best. Yes, you can find a lot of hit and miss part 61 CFIs but you can also get bad CFIs in a 141 course as well who just seem to push you through a mill while checking off boxes as you go.
I have never been enrolled in a 141 course but I have taught them. I learned a lot from a seasoned and well respected part 61 instructor and worked with some young and inexperienced CFIs who didn't care much about the progress of their students.
One thing I do believe is that it isn't so much the instructor as it is the students drive to want to learn. If the student wants it, he or she will find it. I have had students who need to have their hand held from page to page in manuals and I wondered why they were even there to start with. I have also had the motivated students who showed up well prepared and with challenging questions for me which pushed me to be better.
In the end, there is one saying I remember reading about in a book that has always stuck:
"Hire for personality, train for proficiency"
The difficult part is the guessing game a hiring department takes with an interviewee. First impressions have often been wrong in my experience and it is not hard to put on an act for one or two days to be convincing that you are the right guy to hire.
I would have probably added that airlines need to spend more time with an individual on a personal basis prior to selection. Certain undesirable traits are bound to come out in the wood work. Obviously that would be impractical though which is why we have probationary periods.
Also, I am a little concerned about past failed checkrides including part 61 checks. Most have failed 1 and maybe 2 rides before. But a few might have failed 3 which right now seems to be the magical "too much" number (Colgan for example). My concern would be more about the proportion of failed checkrides to total checkrides ever taken and which rides they were (many fail the CFI). For example, which is worse: Someone who has failed 2 rides out of 4 total (that total including private, instrument, commercial single and commercial multiengine) or someone who has failed 3 out of 15 total? (that total including CFI, MEI, CFII, typeratings, and other fun stuff but not counting 121 and 135 PCs) Which guy would be more competitive based only on that information? I think it would be interesting to figure out just how the pilots history of training will be taken into account. Will it be all inclusive, or will airlines come down to a black and white hard number of busted rides allowed and how many is too many? (Like Colgan is now at no more than 2)
Thanks for everyones thoughts on this in advance.