[QUOTE=Glimmerglass;3732650]
The role that television and magazines had, the charm of Penny, and the extraordinary effort in the Belmont all add in his favor to keeping his name in so many people’s minds as beyond great … not necessarily because they actually watched any of his races.
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Alas I don’t expect to convince anyone otherwise as to their opinion ;)[/QUOTE]
To me, the Belmont is really the race that sealed it for most people (at the time, of course, it was rumored he was on Equipoise, a…dare I say it…steroid!).
Phenomenal horse, no doubt. Wow, gave goosebumps on occasion…and what a handsome, flashy package! Certainly in the top 10 of the last 100+ years, although I’d probably put him around #5.
He had weird losses - all of which later were heavy with excuses. By the time the Preakness was run, Lauren Lucien was still saying he had no idea why Secretariat ran a lackluster third in the Wood (eventually, a tooth abscess story took root). When he lost to Onion - and it was a flat-out loss - they came up with sickness as an excuse. When he lost to Prove Out? Gee, I can’t remember what their excuse was for that 4±length drubbing, but they had one.
His wins were really exciting, no doubt. He was a big old train out there and, on his day, was absolutely unbelievable. But having to make excuses for his trio of losses at 3, to me, puts him just a step behind Citation.
While many racing experts put Secretariat at #1 or 2 on their greatest list, many also don’t. Their quotes simply aren’t used in Secretariat-related articles, as they don’t help with promoting the legend.
Great? Yes. Immortal? Yes. One of the greatest ever? Yes. That’s the best I can grant him…and that’s not bad. 
Secretariat also later gained this odd reputation for being the perfectly conformed racehorse, which is at odds with what was written about him at the time. Check out the racing manuals from ‘the day’ - back when they used to study everything about a horse from his hooves to the curve of his ears (back when racing really mattered and, some might argue, writers really studied horses). Secretariat, while very well put together, was no Buckpasser.