FWIW, after reading this thread up to Sept 27th, many owners are doing two things they should avoid and if there is a problem with the tank or its fill neck design, hopefully Toyota will address it before I buy one of your cars as a pre-owned. 🙂
If you nurse more gas in after first shut-off, you risk contaminating the charcoal cannister (an emission device) with raw gas. Warranty is unlikely to cover repair costs.
And the other very expensive bad habit is running your car low on gas on a regular basis. Electric fuel pumps are situated in the bottom of the tank and are integral to the fuel pump assembly which consists of the pump, a fuel filter, its assorted info sending unit assemblies which send measurements to your fuel gauge, and assorted mileage computers, and the steel mounting bracketry that supports it all. The pump is designed to be lubricated and cooled by the gasoline itself. If you regularly run your tank low, you risk both those conditions as you brake and accelerate and go over bumps, but you also risk pump cavitation, another condition which is easily avoided by refueling sooner rather than later after your low fuel light comes on. Most manufacturers build in a conservative safe-guard of remaining fuel quantity when the light is first triggered for all the reasons above and especially to avoid the very unsafe condition of actually running out of fuel at the worst possible moment.
Lastly, a significant detail that is rarely known and basically never discussed till now, is that when a manufacturer (all of them) specifies a fuel capacity of any gas tank, it is the actual volume of the tank, prior to the volume that the entire fuel pump assembly uses up, which in some cases can be more than a 1/3 of a gallon. This uncalculated volume is of more significance when the tanks are smaller like that used on a motorcycle, but after reading this thread, I think more than a few of you will appreciate this rarely known detail. Sometimes tanks can have unusual formed shapes to fit around axles, suspension components, batteries etc, even with structural agendas in mind to increase crash and fire protection. In some cases this can lead to air pockets that fool you into thinking your tank is full. This can be exagerated by gas stations that may not be entirely level where you refuel.
