The onion/garlic thing occurs with some hop varieties. It's fairly common with Summit, and I've noticed it with Apollo. 10 days is possible, but it's a quick turnaround at the home level. I make alot of IPAs and most of mine are in the glass at 2 1/2 -3 weeks. Breweries do some pretty intense whirlpooling to achieve some of their hop flavor and aroma which many brewers cannot duplicate at home. I usually leave the beer in the primary for ~ 7 days , dry hop ~ 7 days usually, keg it and carb it. YMMV.