I ran a scan of my site using P3 Plugin Performance Profiler. It showed that most of the plugins I'm using are very fast - with one exception, W3 Total Cache. Now, that surprised me, since W3TC's purpose is to make the site faster.
I ran several scans and the runtime for W3TC ranged from .057 to .069 seconds. That seems high to me, but I have nothing to compare to. Is that a normal range? The total load time for all plugins together is about 1 to 1.2 seconds, and for the site as a whole about 1.5 to 1.6 seconds.
Thanks for your help!