I disagree.
The "Occupy Wall Street" crowd, while being increasingly co-opted by Democrats, is increasingly being revealed as a "grass roots movement" fostered by traditional leftists such as George Soros, Moveon.org, various unions and communist organizations. They been caught paying protesters and offering to pay legal fees for those that violate the law.
Yet, they don't have a coherent message beyond, "we're mad because, well, we've been told we're mad."
The Tea Party, on the other hand, has had a coherent, singular message since it authentic grass roots inception. "Government is bloated and the cause of all our ills; let's return to the limited government our founders envisioned."
Their protests and assemblies have been, with a few outliers at various Tea Party functions, respectful and organized. They usually leave the space they occupy better than they found it and they don't hang out for days, stinking up the real estate, pretending to actually be accomplishing something of import.