It might be a bit unfair comparing Wilshere to Henderson at this time. Let's be real here, on current form or more recently Henderson is better than Wilshere atm. Whilst I think this is true I also believe it's unfair to disregard Wilshere also, at his best this guy can do wonders but its seems as though he's much too frequently plagued with injury.
Another thing worth considering, what alternatives does Liverpool have to Henderson? He's their best player in that position, is there any competition?(<---- Not a 100% on this one correct me) Whereas with Arsenal, there's easily 1 or 2 others that can easily replace Jack in the starting line up. Hence why we see more of Hendo than of Wilsh.
Essentially, it's not really right to give Wilshere such a hard time at this moment. Let him come back from injury, get a few games together then judge then.