SQD8R is correct to point out that there have been lots of problems with parts deliveries for KTM in North America (which is a great shame, as they are lovely looking bikes). You have stated that there are no such problems in Europe.
However, I would be interested in seeing evidence of your statement. I have no experience of KTMs, and no axe to grind, but simply saying "ISN'T" isn't really satisfactory. Have you ordered parts for your KTM? Have you received them quickly? Have you heard of other owners having problems, or perhaps raving about great and fast service from KTM? This is a genuine expression of interest. I would like to know (I like the idea of a small European manufacturer claiming a strong position against the major manufacturers, which is why I also like Aprilia), but am frankly too lazy to actually go and research this for myself.