In appreciation of Dave's mod, I have updated a screen shot of some of our charts, where I have superimposed the timeline of when this mod was installed so you can see load avg, network load, GoogleBot hits/sec, etc.
From the charts, you can get a fairly good idea what to expect from this mod as far as performance hit and how GoogleBot starts to interact.
Mostly, you will see increased network usage based on GoogleBot hitting your flags and the translations, in and out, which will effect your load, network utilization, cpu, apache workers, etc.
It's all in the graphs... attached for reference. A picture speaks a thousand words, so they say :-)
Graph and stats discussion moved
here.