Their blueline was ridiculously stacked and they had good depth behind their big 4 forwards (Kane, Toews, Hossa, & Sharp)...but they look more stacked than they were because a lot of that depth was just gritty depth at that time. Your Ladd's & Byfuglien's weren't yet the stars they would later go on to become.
Kinda like if Newhook goes on to become a 70+ pt player and people start talking about these avs as having stars even on their third line. Newhook could go on to become a star as soon as next season, but for this run, he was "just depth".