Don't worry about what other website say about your review: it is a good article, but it could be even better.
I have some suggestion for an eventual "Take 2" of your article.
1 - When testing archivers, be sure to use the same compression format on any software: in fact, WinRAR, 7-zip, ZipGenius and any other archiver, all have different compression engines that handle almost the same compression formats, but they all have different performances. A test based on ZIP compression and files extraction would be reliable, only because ZIP is handled by all compression utilities.
2 - Write a separated section about which format compresses better among 7-zip, rar, zip and ace; also you should point out that while RARlab doesn't allow third parties developer to make archivers that can compress to RAR, 7-zip is open source and anybody may write a compression software based on this compression format, that will offer rar-like performances, if properly used.