No, moderates do have ideologies, they just don't know what they are.  They don't know enough to know what they are, that is where the low-info comes in.  Independents are the worst violators, and "moderates" who are party members tend to be better.
I'm sure I could find you statistics showing that independents vote around 50% the rate that party members do (at least thats the case where I live), and that self-described moderates are paying less attention to politics than self-described conservatives and liberals.  These will have to suffice for now:

http://people-press.org/reports/display. php3?PageID=949
With particular attention to the moderate/independents groups like Conservative Dems, Disaffecteds, Upbeats, Pro-Gov. Conservatives, and Bystanders.  They pay average or less attention to politics, and are relative moderates or more inclined to be independents.  Groups that paid more attention to news and were more likely to be party members were those who most identified as being on one side or the other, with the exception of liberals, of which many are independents because the Democratic party doesn't satisfy them.

and from http://www.civicyouth.org/quick/youth_vo ting.htm

"In 2006, young people were more likely than adults 30 and older to identify as strictly independents (26 percent vs. 18 percent) and less likely to identify as Republicans (28 percent vs. 35 percent). Compared to 2002, somewhat more young adults are identifying as independents (up 2 points) though slightly fewer identify as Democrats (down 1 point)."

While this Pew study on media found that young people payed much less attention to politics, were more likely to get political coverage from entertainment/comedy sources, and were much less informed about politics:
http://people-press.org/reports/display. php3?ReportID=200

Finally, this source describes the much lower voting rate of independents:
http://www.reason.com/news/show/34713.ht ml
"But something that has changed--a lot--is the voting rate of true independents. Their turnout has plummeted by about 30 percentage points since the late 1950s."

That isn't enough to support what I said, but it is a beginning.  And what I said isn't speculation.  I've seen numbers, I just don't have access to them at the moment.  One of my specialties is working with data; I've done some precinct/voting patterns analysis, so I know that indies just don't vote, or at least are unreliable.  It makes sense from my experience, because my indie friends are unreliable voters, and the party/campaign apparati find it more difficult to reach out to the kinds of people who are independents.  They tend to be younger, more transient, etc., at least in my experience.