I agree completely Bruce.  There's lots of discussion on dyno differences
out there.  That's why I use a G-Tech and on-road testing.  Every good
tuner uses dyno testing combined with road testing to get a complete
picture of an engine's performance.  However, it seems there are more folks
with dyno data than have a willingness to do 0-60 or in-gear times.  My
favourite way to gauge performance changes with my autocross car are simple
30 to 70 km/h (in second gear) times.  These are easily repeatable tests
with no shifting, wheel spin etc. to deal with.  Using a G-Tech with my
auto westy to do 0-60 times also produces reliable and reproducible results.

I think the biggest problem is that very few actually take the time to
check before and after they make a change.  It's such a simple thing to do,
I am puzzled why more don't do it.  This and every other list, despite
being storehouses of good data, are also full of information, argument and
pointless comparisons that are completely un-correlated with any
measurement...drives me crazy.