Well right now it's been in the bottles for about 3 weeks. It's properly carbonated but it still has a very green flavor to it. So, in the sence that it seems to take a while longer to mature, yes, I can taste a difference. We'll have to see if I can tell a difference in the finished product. I'll dig this thread up in a few weeks and report back.
Here's the recipe in case anyone was wondering:
12oz 20L crystal malt - steeped
6 lbs Extra light DME
Last 15 min:
1 oz cascade(flavor)
1 tsp. Irish Moss
Last 1 min:
1/2 oz. cascade
Then pitched with Wyeast 1318 London III
As you can see I had some extra cascade laying around.