found this on a guys blog,
"From 2006 on, I've been dedicated a month or two trying to learn more on the grading of Longjing. So far, the experiences were Before Rain Pre-Qing Ming (3 grades), Pre-Ming, and after Qing-Ming Pre-Grain Rain (3 grades). Each year, I do concluded on the same result. The Second harvest after pre-ming or pre-rain is the most bold and savory. Hence the less expensive price tag. Green bean, orchids, dry rice, sweet corn and seaweed.
Due to the harsh Spring weather this year, 2010 harvest has been compromised. More interestingly, a Pre Pre-Ming longjing sample I received from Hangzhou Tea Institute, besides it has much earlier harvesting date, the hair ball from the young buds were very obvious.Traditionally, the fury balls are sifted for a unified appearance. This year, I have seen many vendors advertising the extra fluff as a guaranteed of pre-ming premium harvest. Are these new tactics or marketing scams? The more the vendors add fluff balls or hair, the higher the price they get for that weight.... Some fluff balls I've seen on the web is like bubble tea/tapioca pearls/frog eggs. Very soon, 2011 will have Pre-Pre-Ming, after last snow, first valley mist, White hair Shi-Feng blah blah Longjing, which is covered with fluffs."
so i guess it's as most thought... it's just fluffed off balls, still makes me ill..."hey look at all those fluff balls, damn that's some high grade longjing!!!"