Glad you enjoyed the site.
That is, you know, a loaded question. Some
prosecutors will say that, yes, grand juries do act as a rubber stamp
for them (and they think that is great). Other prosecutors will
disagree, citing the independence of grand juries.
I think they do act as a rubber stamp on the federal
level (I do not have the statistics at hand, but if you check the
Administrative Office of the U.S. Courts you might find them - they show
that federal grand juries indict in something like 98% of the cases
presented to them), and tend to do that on the state level, as well. My
theory is that federal grand jurors are rubber stamps because the cases
often are more complicated, and because they may be more intimidated by
the context (federal courthouse, federal prosecutor, federal agents,
etc.). The other part of my theory is that state grand jurors at least
have more capacity to exercise independence because the cases they deal
with are "closer" to their real lives, e.g., people in the community
accused of crimes the elements of which are more straightforward. But,
of course, I could be wrong.
If you want to find out more about this,
print/download the law review article
, and you will get to read my very lengthy discussion of all this.