[metmom]

But in the journal Science, a report stated: “These examples say that natural selection can cause a population to change very quickly and hint that speciation could [occur] very quickly …”

That doesn't seem unreasonable, PROVIDED that there is a lot of genetic material to begin with.

If genetic material is added by time and chance mutations, that would be a much slower process. That wouldn't allow for fast, large changes as there wouldn't be sufficient material available to sustain that kind of rate.

[GodGunsGuts]

==That doesn’t seem unreasonable, PROVIDED that there is a lot of genetic material to begin with.’

Precisely! You make informational changes with information you don’t have. Excellent point Metmom!