Timing
I measure both cycle times and shutter delay times, using a test system I designed and built for the purpose. (Crystal-controlled, with a resolution of 0.001 second.) Here are the numbers I collected for the SD100:

NOTE: My qualitative characterizations of camera performance below (that is, "reasonably fast," "about average," etc.) are meant to be relative to other cameras of similar price and general capabilities. Thus, the same shutter lag that's "very fast" for a low-end consumer camera might be characterized as "quite slow" if I encountered it on a professional model. The comments are also intended as only a quick reference: If performance specs are critical for you, rely on the absolute numbers to compare cameras, rather than my purely qualitative comments.

Power
The SD100 uses a single lithium-ion cell for its power source, or the optional AC adapter. Because the camera's AC adapter inserts into the camera via a dummy battery, I was unable to perform my standard measurements here. The SD100 did show generally good run times though, operating for nearly 90 minutes from a freshly-charged battery, in its worst-case mode. (Record mode, with LCD active.) - As always though, I strongly recommend purchasing a spare battery along with the camera, as digicam batteries always go dead at the worst possible times.

Storage Capacity
The SD100 stores its photos on SD memory cards, and a 16MB card is included with the camera. (I strongly recommend buying at least a 64MB card for more storage space.) The chart below shows how many images can be stored on the included 16MB card at each size/quality setting.