You're right, Nxg5 is good too. That variation mentioned is not accurate at all.
Question on Queen's Gambit Declined- 8th move Nxg5?

If you look it says playing Nd2 is good for black there, after Nxd2 Qxd2 dxc4 the Bd3 and the Bg5 are being attacked and black wins a piece, since this was from black's prespective you had to look a bit deeper to see what happens after Nd2
Okay, so I'm playing my friend, and I'm trying to work on my openings, so I've been reviewing the main lines (one of which is the Queen's Gambit). In this instance, he's playing black and has declined my gambit. So I found a site that gave me the standard moves for Queens Gambit Declined (although it is from the perspective of black, I figured it didn't really matter). On move 8, however, the site offers Nxd2 for black, and my friend played Nxg5! I don't understand why this would not be the move recommended. Where and how can I get my material back from this? I'm only an intermediate player at best so any help would be appreciated. Here is the site for reference: http://www.chesscorner.com/tutorial/openings/queens_gambit/queens_gambit.htm (He is taking my bishop without any obvious means of retaliation on my part) Is it just that his formation is now inferior to what I can make mine? Losing 3+ points, in the beginning of the game, for no apparent reason, isn't a very nice prospect for me. Thanks again in advance.