Is “Eco-glass” reducing the quality of Nikon lenses?

Somebody at dpreview thinks that way:

“This probably is what is causing the varied results people are getting from the new 50/1.4 G.”

Is there a problem with the new Nikon AF-S 50mm f/1.4G Lens? I was not aware of that.

Here is a pamphlet from Nikon on their Environmentally Sound Optical Glass.

Can eco-glass be as good as regular glass (Nikon claims so)? Is eco-glass = recycled glass?

fyi – I do believe in recycling and I am happy that Nikon does too.