I've experienced several varied stations in my recent 3800 mile trek. I found a couple touchier than most but getting the nozzle in as far as it goes then ramping up the flow from slower speeds usually lets me reach full-flow.
If muliple stations (rather than just two) have the same issue, your filler pipe might have a constriction that isn't typical, something that should be taken care of under warranty. The best way to demonstrate the issue is to be low on gas when you arrive for a Smart Center service appointment and have the service person try to fill the tank, preferably at a station and pump where you know you've experienced the problem.
There's nothing like experiencing one of Murphy's Corollaries first hand: "When a brolen appliance is demonstrated for the repairman, it will work perfectly."