The simple explanation is this: the delegate counter, when it first loads up, assumes that all future races are split 50/50, so future delegates are added in as such. To see the current delegate count for one candidate, set all future races for the other candidate to 100%. (EG, to see current pledged delegates for Obama, set to 100% for Clinton.) Doing so shows Obama currently with 1413 pledged delegates and Clinton with 1255 pledged delegates. For comparison, NBC has it 1408-1251 and CNN has 1413-1242.

There is no bias here. Only your inanity.