I didn't read the linked article that begins this discussion, but I did want to comment on the tendency of Pens' fans to hold Crosby less accountable for the Pens' playoffs collapses than Fleury, Letang, and Malkin. I know I certainly have this tendency and tried to come up with reasons for it:
1.) Crosby didn't have a great series against Detroit in 09, but Detroit focused their entire defensive strategy on stopping his line (i.e. matching Zetterberg and Lidstrom against his line). Arguably, this allowed the Malkin and Staal lines to do what they did and win the series for the Pens. In today's NHL, I think a competent defensive team can pretty thoroughly shut one top offensive line from the other team when they make that line their exclusive focus, so I don't hold this against Crosby too much.
2.) Last year and this year, I cut Crosby some slack because of injury issues.
3.) Crosby commits a fair number of stupid turnovers, but seems to do so less frequently than Letang and Malkin and seems to do so less frequently than Fleury lets in soft goals. This might just be confirmation bias, though.
4.) Over the course of his time in Pittsburgh, we've seen Crosby diligently work on his weaknesses, constantly trying to make his game better and more well-rounded, and he's made real progress with this. Malkin, Letang, and Fleury all seem to have plateaued, having stayed (to varying degrees) at that same mix of amazingly good and amazingly bad for the past several years.