I've just measured our water bottles at 3" overall dia (2.5" at the neck) and 8.5" tall without the lid.
With the lip of the bottles over the rightmost set of tines, I recall them rubbing against the top of the doorframe when the rack slid in and out. In fact, there was one position along that row where the bracket extends a fraction of an inch inside the rack, and that would push the bottle bottom high enough that it would actually *catch* the doorframe. I'm starting to have flashbacks here...
So yeah, I'd definitely say the right-hand side of the upper rack is normal-height, and the left-hand side is very shallow (presumably to allow room for taller items like baking sheets in the lower rack). Had we taken the jump to the two-rack model with an adjustable upper (79xx, I think?) it's very possible we'd still have it, the more I think about it. We wanted the countdown display, though--but that's a moot point with the redesigned panels. In fact, if those are capacitive (feather touch) buttons, you might specifically want the top-control model to avoid inadvertent activation when standing next to the counter! (My mother is forever turning her Bosch OVEN on when she leans against the island, as an example.)