Disagree. I say walking is best, unless a really tight connection. No reason to take Skylink in these cases.
OT: For amusement, I think we need a race between various modes of transportation ala Top Gear's bike vs. car vs. boat vs. subway race between two London airports. We could do walking vs. Skylink vs. golf cart.
I bet the results would vary greatly based on the specific gate start and end points...