Peter,
I ran a Pingdom.com test
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Testing from New York, NY your site wasn't really all that slow, but any delays occurred before PageLines even loads. If you look at the second of the two images below, you'll see the load time is 1.49 seconds wait time for the server to display the URL. That's a hosting or server issue, not PageLines. Then, you have 2.26 seconds wait time for mcsf_action=main.css, which appears to be Mail Chimp.
Cumulatively, those two issues alone account for 3.75 seconds wait time out of 6.56 seconds. Essentially, if these issues are removed, with WordPress, PageLines and any PageLines customized code you may have, images, javascripts, plugins, etc, you'd have a load time of 2.81 seconds, which is excellent.
I would highly recommend using Pingdom to diagnose each of your other sites.
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