RigaMortus said:In order to counterspell a spell, you need to first identify it via Spellcraft check.
This is incorrect. According to the SRD - Magic Overview: "You can use dispel magic to counterspell another spellcaster, and you don’t need to identify the spell he or she is casting." Admittedly, you are limited in your spell choice if you can't identify the spell, but it's not impossible.
I don't think there are any rules about identifying a spell from a wand. You could use the method Deset Gled just described, but that would be a house rule.
Can you give any support to this ruling? As andargor pointed out, using a wand is still "casting a spell", it just uses a spell trigger method rather than normal casting, and as such doesn't have any somatic, material, or focus components (wands also have a command word to activate them, but whether or not this is the same word as the verbal components of the normal spell is not clear). Why would identifying a spell cast from a wand be any different than identifying a spell cast with Still Spell and Eschew Materials?