Originally Posted by
Full Score
That's exactly what I did. I alternated between Z & U, but using different locations. I simply listed them in descending order of duration to clearly show the differences.
The US West Coast seems to be particularly slow.
Right that's the problem, you used different locations. You should do the same exact search (date and city pair) for Z and U (as separate searches) then compare between them. This way the only variable in the search is class, not class and city pair, so then if there is a meaningful difference in search time, you know that the only difference is class requested. If you find meaningful results after doing that, please email us the specifics directly, thanks.