Of the recipes started in 2005, I don't think Dayi has ever been that consistent.
There are major decreases in quality for all of the classic teas I can think of from 2005. GLWL, 7742, v93 shu, Star of Menghai, Mengsong Peacock (the only one with arbor leaves), Spring of Menghai, etc, nothing from 2006 were really as good. Or later. So I think Dayi does change recipes slightly from year to year. I have not had the 2007 GLWL in a very long time, but I've had the 2008 recently, and I'm not very fond of it...
Now, Dragon Pole, not so sure. I have the 2009, and I'm not particularly fond of it, but I do sorta like it. However, I like the 2007 Star of Menghai more, and the 7262, when it's well behaved.
It seems these days, the furor in China is over Lancang Millenial 0085 shus. You ever got a chance to try that, KC Lam?