Comcast DVR like Tivo

The thing I don't like about the Comcast DVR is that it is not like Tivo in the fact that when you fast forward and hit play Tivo jumps back about 5 seconds and Comcast doesn't.  I came up with a workaround.  On comcast click fast forward twice then when you see the show hit the instant replay button (looks like a arrow going counter-clockwise).  Then presto you are lined up.