He makes some good points, but I'm not convinced other GMs value Dupuis that much. I truly believe the speculation is his points are based on who he's playing with as opposed to the tremendous value Dupuis brings on his own.
I would make 2 points. First, [and this was alluded to in the article] while I think I might even be fantasy worthy playing on Crosby's wing, messing with proven chemistry between players is a dicey thing. My guess is it makes more sense to keep Dupuis for the post-season run and lose him for nothing than to trade him for what I believe would be a middling return.
Second, if PIT does make a move at the deadline it will almost certainly be for a marquee player who will play RW on Crosby's line...bumping Dupuis down or off the roster [my bet is on down...in case the chemistry isn't there you can always call him back up].
I don't think the "return" is there right now to sell as high as the article postulates.
10 Team [keep 10 + 4 prospects]
Scoring F=1[g/a]; D=2[g], 1[a]; G=2[w], -1[L], 1[OT], 2[SO] Top 12 F, 6 D, 2 G count
Forwards
Crosby, Ovechkin, Backstrom, Wheeler, Byfuglien, Hornqvist, Simmonds, Ladd, Zuccarello, Ribeiro, Desharnais, Semin, MacArthur, Moulson, Purcell, Soderberg, Dupuis
Defense
Keith, Goligoski, Carlson, Krug, Trouba, Streit, Pouliot, Ceci, Nurse, Martinez
Goalie
Fleury/Price/Rask