I think the graph comparing the APU to the Core i5-4670K may have been interpreted wrong in this article. If I understand the graph correctly, the APU has a 13% increase over the i5 on Basemark, a 46% increase in FireStrikeX, a 38% increase in FireStrike, and a 39% increase in the Extreme benchmark.
The numbers listed in the article implies that the APU used in the test has doubled performance over the i5 just with a driver update.
Casey