Not every review, no. Only the bad ones but TP's automatic systems picked up and flagged a whole bunch of suspicious reviews a few days ago (all of them positive glowing reviews).
26th December? I'm sure that a few positive reviews were posted within the past couple of days.
Some pages back, I posted a link to a newpaper article (Guardian, I think) which highlighted the propensity for TP subscribers to use "review-writing services" to populate their TP pages with positive reviews. I did a quick Google search and found quite a few of them.
Paul..