The comment by the ducati guy (not suppo or the racing team guys as I recall) concerning barros is very widely known and not something I endorse , but occurred off the cuff after a race in which barros made a maverick tyre choice against the recommendation of bridgestone and different to all the other bridgestone riders; he was a wily old fox and credit to him, but it is a stretch to suggest this indicates he was regularly capable of beating stoner, rossi or the other top riders, particularly since he doubtless had an inferior satellite bike in the first place as is the way of things, although as I implied he may have had more ability to sort a bike than subsequent incumbents and possibly stoner. (EDIT It was quite unnecessary to say it let alone attempt to enforce team orders against pramac d'antin, as it was, anyway; they had that well in hand by having d'antin run the team in the first place, whom I am sure was capable of finding purposes much more pleasant than paying a suspension tech with any money going round)
The capirossi thing is a new one on me, you will have to enlighten me. I recall him winning in japan in the rain, the race where stoner clinched the world championship, was never in contention to win, finished well down the field and rode nervously but managed to cover rossi which was all he needed to do; it had not previously occurred to me that loris needed to, was expected to or could have followed team orders in that race.
I did think that capirossi was pissed towards the end of the year at more or less being discarded by ducati , understandably so after so much loyal service, and would agree that the offer of a third bike for 2008 was a token one , but the alternative was to sack stoner since they had already signed melandri, which might perhaps have been hard to justify since he had just won the world championship for them even if you or others don't find him likeable.