The question doesn't qualify "consistent performer" in terms of playing from game to game, winning a match or others. This is intentional so as not to limit the scope for discussion.
The charts below seem to suggest so in a general sense. What's your view?
In addition, there may be other interpretations/observations that can be made from the charts. I'm leaving the brain-teasing exercise for your enjoyment.
It's interesting to note that in the Standard Deviation chart for 2011-2013, LCW's second games had wider score swing than the other two. There may be a story behind it. Any taker?
The source of the scores is from bwfbadminton.org, Players -> Head to Head tab
between Lin Dan (LD) and Lee Chong Wei (LCW).
Courtesy of Badminton World Federation.
While effort has been made to ensure accuracy of the charts, the author makes no warranty, express or implied for using it, or assumes any liability or responsibility for the
accuracy or completeness.