What you quoted is from a site regarding the Street Fighter Zero 3 manga which I've stated I don't consider as canon considering how much it messes with the Street Fighter storylines. But the part regarding Ryu's sensei is accurate according to most of the sources I've come across (Wikipedia being among them). Akuma (Gouki) and his brother (Gouken) were trained under the same sensei (Goutetsu) and Akuma's brother took on Ryu and Ken as students

Here's the site with the whacko info on Street Fighter Zero 3 manga
http://www.megspace.com/arts/rcllair/hkcoms/HK_SFZ3.htm

And here's some references for Akuma's story and creation and some bits on Gouken, Goutetsu, Ryu, Ken, and some mention of Little Miss (Gouken's daughter).
http://www.absoluteastronomy.com/ref...hter_character
http://en.wikipedia.org/wiki/Akuma_(...ted_characters

This one mentions the Hong Kong comic changing the story to match the EGM hoax
http://www.gamespot.com/features/vgs...heng_long.html