Here's Morningstar 5 year #s for CAIBX: total return: 3.26 (after taxes: 0.41)
just for fun: CAIBX is really four classes (currently 7% cash, 43% Intl, 20% Value and 30% bonds). If INSTEAD you bought four cheap indexes in same proportion, which I just ran the #s on, your 5 year return would be 3.16. The Std Dev would be only 9.45. The taxes would be much lower with this passive strategy than with CAIBX.
Moral of this story? CAIBX's returns are based on the Asset class %'s, not picking great securities. Might as well be tax-efficient since the rest is so similar. Am Fds simply uses SP500 as the benchmark usually--a joke, but it's good for sales.