I suggest reading the link to Englebeen inside the article linked above. Englebeen is no slouch and an AGW skeptic to boot. The difference between my view and his is that while I agree with him that current CO2 is the highest since the last ice age (that should be obvious to anyone), it is not unprecedented before that because the Antarctic cores showing the farther past are extremely low res and smoothed.
Whoops that should be Engelbeen