I know that the Nancy Grace, JVM, et al neglect to say this but deliberating 10 hours isn't all that unusual.
Juries can, and have been known to, come back in far shorter order with a verdict. Two examples which I have details to hand are Morgan Leppert (FDM, FL, 2 Hours deliberations) and Sarah Johnson (FDM, ID, 10 hours deliberations, 6 week trial,
http://bit.ly/ri7HD4)
Also remember Scott Peterson (FDM, CA). After the first juror was dismissed the jury deliberated just over a day, taking Veterans' day off, before returning a verdict. The deliberations before that are irrelevant since a jury is supposed start deliberations afresh after one of their number has been excused/dismissed.
The fact of the matter is quite simply that juries can and do return verdicts quickly even in long cases. I don't agree with it since I believe that it can lead to a rush to convict.
However, people on this board would have no qualms if the jury came back with a conviction in the period of time which they did. Indeed, I bet my bottom dollar you would all be arguing that this indicated how "clear" the evidence was and that it was "obvious she done it".
What people are really annoyed at is the verdict itself, not how quickly it was returned.
But what is the point in trying someone if your not going to accept any verdict apart from Guilty? (See caveat contained in footnote)
FOOTNOTE:
I would understand if the evidence was so clear that nobody could look at the evidence and say that there was any doubt that she was guilty but as much as you would like this to be this is not one of those cases (compare with Joseph Smith's murder of Carlie Brucia and John Couey's murder of Jessica Longsford). Indeed, as has been pointed out by many (including one of the verified attorney's on this board), the evidence of pre-meditation was far from iron-clad to say the least.