Saw this on WPcentral. Thought that it will be good to post it up here. According to the sources, HTC Titan and Radar have suffered graphics lag when some graphics related apps (games) are played.
WPCentral has a temporary workaround for this issue. It is actually very simple. Go to settings, locate sound enhancer, disable SRS enhancement for music (set “no effects” for video). That is it. Hopefully, HTC can address to this issue.
Here is a video to show you the differences.
[ad#img]
[ad#boxlist]
(source)