Wow BM, this is another hit. I was nervous about Summit hops but I love this beer.
I brewed a 5gallon partial mash/partial boil version of this made with Beersmith. I used 8lbs total of grains and 1.5lbs of DME with expected 66% eff. I get with my setup. I basical BIAB inside a 5gallon kettle and sparge through a bucket with holes drilled in the bottom. Then I do a 4gallon boil in the same kettle. Add DME at 15min and top off with ice to cool.
I was very skeptical to the Summit hops after hearing onion and garlic notions. I do see what people mean but it isn't the oniony flavor you expect. Can't explain it but I do sense some onion flavors, only subtle tones you don't associate with onion usually. The tangerine is very prevalent.
I totally see and agree with your comparison, BM, of the Cascade/Cent. hops being a yellow and this being an orange. This brew has a great residual sweetness that lends itself to the Summit hop flavor. It's delicious in any sense of the world, you lick your lips after a big drink of this. Mine has great lacing and about half a finger of head the whole way drinking the glass.
I just had my first glass after 20days in primary, and only 1 week carbing in bottle and I already see myself brewing this again soon.
I say it's another hit because I brewed your Centennial Blonde about 2 months ago. It was awesome and was drank faster than any of my other homebrew. And even earlier today I brewed my own variation on the recipe and made an Apricot Blonde Ale with homemade apricot puree added to the end of the boil and the secondary.