I think it depends on the nature of the individual horse, what kind of clip you plan to do, etc. I don't think I'd full clip a youngster, but that's personal choice. I live in New Zealand and my horses are double rugged (they live outdoors) for a good two months of winter... and so to clip a youngster would seem wrong in my books! As it is, our show season here is beginning and I've only just taken my horses down to one rug (yes, I'm a tad over the top, but I blame that on bad habits picked up from my show queen of a friend lol) and if I were to clip my gelding right now, I'd have to double rug again... so I'd also play rugging into a factor and with youngsters I wouldn't wanna be over rugging them lol.
I'm babbling now, so my basic answer is... what the plans are for the horse, the individual nature and what style I was clipping for, would all be a factor in my decision as well as on the rug factor. Naturally people with barns, etc wouldn't have as big of a deal as I would!
♥ Seoul Searchin' for the Lovebug ♥