Seems about accurate, but the variable speed systems are a big QoL upgrade regardless. Just being able to have AC on lower speeds has helped a lot with humidity even when the house doesn't necessarily need cooling. We upgraded last summer from a 3 ton unit to a 3.5 ton unit (max size our ducts would support). It's still struggling to hold 75 when over 100 outside and some upper rooms hit 80, but that's more down to our ducts and layout of the house. The lower humidity and constant (yet inaudibly low) air flow makes it feel much more comfortable at 75 than with the old system.