I want to see who you summarize as particularly technophilic.
Have you ever met a technophobe? Opposition to life extension. Fear of nanotubes. Tolkein's aesthetics. Attraction to "natural remedies" and distrust of traditional medicine. Shouting 'hubris!'. Saying "you can't" in revulsed tones - not "it's not possible, look at my model" or "it would make you a bad person", just a gut rejection. Earlier, opposition to anaesthesia during childbirth and to industrialisation.
I would say something like Ray Kurzweil's "The Singularity is Near" is particularly technophilic; it embraces basically every belief that has ever been associated with the word singularity, while sweeping essentially all concerns of danger or ethics under the rug essentially by hand-waving.
I would certainly say that LessWrongians tend to be at least slightly more technophilic than average people, but not much more than I would expect for a group that is centered around a website. Having conversations with other people, I tend to find that they a...
Concerning Less Wrong's tagline, consider this plausible reaction of someone looking at LW for the first time:
And here are two real quotes from 2009:
And in reply:
The quoted text speaks for itself really. So therefore I think LW's admins/web designers should seriously consider replacing the rationality tagline with something more savory.