Yea, a lot of LED's work really really well. Just as well as anything else. Please take into consideration that growing with LED is a touch different than HID and it takes some getting used to. Also, take into consideration that, just like HID, that it really depends on the grower. Perhaps you saw a grow from a person that is learning rather than a graduated MJ grower.
I'll give you one thing, LED's are basically the same IMHO, I see grows from blackstars, Ledgrowlightsdirect.com, Haight, Kessil, so on and so forth, and the difference seems to be the price tag. There are small differences, but I can't draw any conclusions due to different grow methods, environments, genetics, seed/clone condition, so on and so forth. However, the conclusion I can draw is that LED's work. They work just fine, and have a firm niche in the grow community. You can't tell me that every PC cab grow couldn't use a good UFO or Kessil.
For my purpose it is the perfect compliment to my HID system. As I get my crops in I am transferring to small HIDs (250W) mixed with 240 LED's. 1000W per room, light is spread out better, and the HID's provide the heat I need to keep my temps in the high 70's. I would have to use 1400W per room to achieve the same plant count (at least).
Here's what I love about the LED's and this forum will see if I am right or wrong in a month or so, but I believe that LED's (flowering UVB models) are best mated with 7500K Metal Halides for optimum flowering. The Red will be there, and seeing as how MH give off a lot more UV than HPS, coupled with the UVB from the LED's I can't see how that wouldn't blow up trich production.
You just have to think outside the box a little.