I’ll bite…
But please understand that, up to now, I’ve been biting my tongue because what I have to say is probably not what you want to hear. Take it with as many grains of salt as you like; I’m just relating my first-hand experience in Indoctro-land. Perhaps it will spur others into responding or refuting.
About 10-12 years ago, I was very interested in Indoctro for my TB mare. I asked VDL (can’t remember his first name, but it was the van de Lageweg family member who runs the stud) about breeding my TB mare to Indoctro to produce an eventer.
First off, I want to say that I’ve never encountered a stallion owner as prompt, honest and helpful as the VDL guy. Email was like instant messaging. There was no sugar-coating. There was no ‘selling’. There was no I-am-VDL-I-know-more-than-you. There was genuine enthusiasm for breeding, lots of detailed knowledge, and the assumption that a random emailer like me was an intelligent breeder.
He did not recommend Indoctro for my mare. He recommended against it. He didn’t think I’d get the jump or gallop for an eventer. When I asked him if he’d recommend any of his stallions for a TB mare to produce an eventer, he thought about it and said ‘Corland, for the canter.’ This was before Corland had proven himself as a sire of eventers, so it seems that VDL was correct in that assessment.
I have seen several Indoctro offspring, one in eventing and a couple in SJ. The ones I saw were nice-looking and could jump, but they all had a tendency to jump from wherever and hang in the air. The opposite of catty, in other words. (I have no idea what the dams of these horses were like.)
I haven’t seen this VDL Windsor so I have no idea how he reflects on Indoctro or vice-versa.