First off there were two sets of quotes. One makes very little sense if read without the other.
I was also never arguing your use of it. Just against another player who said Noob and Newbie are exactly the same thing and even argued that they were right and another player was wrong 100% without any actual research. Noob by definition has a more negative history of use.
I could probably spend all day finding chats, references, screenshots, showing the way Noob is used in gaming to insult others, and it wouldn't be very hard either.
http://www.etymonline.com/
noob (n.)
c. 2000 in gamer slang,
variant of newbie;
often used interchangeably with it, but also often with a more derogatory shade of meaning; newbies owe their clueless behavior to lack of experience and can improve, while the fundamental characteristic of noobs is incorrigible obnoxiousness or stupidity.
newbie (n.)
"newcomer, new person to an existing situation," by 1969, from new with diminutive or derogatory suffix. Perhaps originally U.S. military slang. Compare noob. Middle English had newing "a new thing" (early 15c.); new was used as a noun meaning "naval cadet during first training on a ship" (1909); and newie "new thing" is recorded from 1947.
http://geekdictionary.computing.net/define/noob
Definitely not a real dictionary, however since these are user posted, it should show you how people believe the word is used.