  We examine the shortened KK spectrum of IIB supergravity compactified on
Y^{p,q} and conjecture that the spectrum we have obtained is complete. The
(untwisted) shortened spectrum on S^5/Z_{2p} and T^{1,1}/Z_p are obtained as
special cases when p=q and q=0, respectively. Knowledge of the shortened
spectrum allows us to compute the superconformal index of these theories and to
find agreement with earlier calculations from the dual field theories. We also
employ the shortened spectrum to perform a 1/N^2 test of AdS/CFT by
holographically reproducing the difference of the central charges, c-a=p/8, of
the dual CFTs.
