I'm actually trying to look this up...new..I think you are right. Good sillage means that you can smell it in the aura of the wearer and not just up close. Funny thing, is, often I'm looking only for close to the skin sillage...sometimes if someone elses perfume has GREAT sillage, it's not so great for me!! Also, what's it called when someone hugs you & you smell THEM for the rest of the day!? If you find anything else out, please post it. You've already taght me something by asking your question. Thanks! OH AND ByTHE WAY... zztopp has great commentary on perfumes. You could check out his reviews as he frequently talks sillage...he knows which perfumes have high/low.