[longshadow]

The greater the acceleration, the larger the estimate should become, as far as I know.

This was discussed in the press conference today.

The greater the "repulsive" effect (dark energy?), the older the Universe is, relative to the age that would be acertained by the Hubble parameter alone.

The example given in the press conference was that based only on Hubble expansion observations (no repulsion/accelerating expansion effect), the age of the Universe would be about 9 billion years. When they factored in the repulsive effects on expansion, the result was about 14 billion years, which coincidentaly, is almost exactly the figure that these scientists came up with using the completely independent white dwarf cooling model methodology.

[apochromat]

My understanding is that the acceleration rates in most models have different epochs, with plateus and peaks, rather than being a constant or exponential acceleration. There are more than a few distinctly different epoch models, as far as I know.