i just finished going through every Block and Type in 1.00 and then again in 1.01 and noting the CPU usage. i'll put together a list or chart later on my site, but i was curious to find out where the CPU improvements came from.
a few tidbits... Amp blocks use the same amount, but Cabs use about 2.5% less, Reverb is close to 7% less at High Quality (2% at Normal), Drives use about .5% less. other blocks use about .1% less or have no change. Intelligent noise gate is about .3% less as well.
so if you used many of those blocks before, you'll see the most significant CPU drops. my main preset dropped about 5.5% which is great!
again, i'll get a chart going soon with each Block and Type for 1.00 vs 1.01, but those Block types had the biggest changes to them. amazing!