In reply to Mountain Spirit: have a think Savvas, what is Dave using most when climbing those problems? Do they relate to what he needs when winter climbing?
Dave M is an incredible climber in all disciplines, it must be very hard to keep a foot in the door of all of these whilst also pushing the limits of each one. Even more so when seasons overlap for each discipline, and even more so when you live somewhere that is renowned for having unpredictable weather!
I really doubt that he saw a strong link between that problem and his hard winter climbing. Perhaps he is pushing both bouldering and winter climbing in the colder months, that way he can make the most of the weather whilst also keeping fit for routes in summer.