Not for an observational result it isn't. Those can sit around for thousands of years before someone comes up with a satisfying explanation for the data.
Look at how long it took us to figure out that the sun's warmth comes from nuclear fusion.
Hubble's correlation between distance and velocity only goes back to the late 1920's. The cosmologists will be doing great if they can come up with an explanation better than vague hand waving about colliding branes and extradimensional leakage anytime in the next five or six centuries.