Using Escape's listed counter depth of 22" on their existing trailers, and using the countertop areas listed on the E23 portal, here is what the equivalent counter lengths would work out to be for the different plans:
F1, F2 and F3 = 9.47 ft^2, which is equivalent to 62" x 22"
F4 = 9.17ft^2, which is equivalent to 60" x 22"
F5 = 9.97ft^2, which is equivalent to 65-1/4" x 22"
F6 = 9.98ft^2, which is equivalent to 64-5/8" x 22"
For comparison, the 21C = 65" x 22", 5.0TA = 56" x 22, E19 = 48" x 22".
Those are what are listed, you can correct me if I am wrong.