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I reviewed both the old and new. The new review is posted on the Lump Charcoal Database website: www.lump-charcoal.com.
I'm not sure what you mean by "update your rankings". The rankings are done every time you view the page. All the votes are recorded to a database and the rankings are generated from the database. I just checked and I did reset the database and the comments when the new review was done.
As for comparing Picnic and Kingsford, I'd have to have a new sample to see how much the size distribution has changed. Kingsford does a bit better on ash and burntime, though.