no, not really - a lot of websites just copy wiki, i found a ign article from july 09, that basically surmises what you said 'there has been an explosion in quality in-house engines coming out of the publisher in recent times. This includes Dunia (Far Cry 2), LEAD (Splinter Cell: Conviction), Fox (Naruto: Broken Bond), LyN (Beyond Good & Evil 2), IRISZOOM (R.U.S.E) and Anvil, aka the Scimitar 2.0 Engine'
http://pc.ign.com/articles/100/1003725p3.html
i remember a rumor about the anvil engine using some unreal code, but that was on 4chan so....