My take
I believe it has been clarified why there is a basic difference between sundering a weapon or shield, and attacking an attended object.
What it really comes down to is the defender's reaction.
When I swing a weapon at you, you are going to bring your weapon or shield up to block. What that does is open up that object to more likely contact by my attack. Thus, the sunder rules are designed with the notion that the defender is using that weapon or shield to defend themselves normally.
Striking an attended object, however, is different because said object is not used to defend against the attacker. Attacking someone's wand is more difficult because they are not going to bring it up to bear against the attacker.
That is, AFAIK, the reason for the difference in rules.
So, IMO, you can indeed Sunder a shield. This includes any feats, abilities, advantages, etc., that apply to Sundering.