Well, my male is 8 years old and my female will be 5 on Monday, and they both still do it, so I don't think there's much hope for your James settling down anytime soon!
They've calmed down a little as they've reached, ahem, maturity (which I have learned is purely theoretical with Bengals), but yeah, for at least 1/2 an hour a night they go nuts. What is really hilarious is when my little female (all 7 lbs of her) stalks and lies in wait for my big male (17 1/2 lbs-- yes, that's seventeen and a half. He's a moose). She has a very effective flying tackle, and can usually knock him off of his feet (the element of surprise helps a lot), but he rebounds and chases her up or down the stairs (we have a three story house, with two sets of carpeted stairs for them to race up and down). But when it's over, they are both big lap kitties. Winston in particular is a huge baby-- he wants to be held, and will lay on his back in your arms with his feet in the air, purring until he drools.
Never a dull moment!