I typically find the reviews to be relatively balanced, providing a fair analysis of the phone's features and performance in comparison to other phones on the market. I scanned through the most recent reviews from Bonnie Cha and noted the following as offering high praise from a performance perspective:

"Out of everything, though, the one aspect of the Droid Incredible that absolutely knocked our socks off is general performance."

"With a winning design and fast performance, the RIM BlackBerry Tour 9630 is one of Verizon Wireless' top smartphones for both business users and messaging fanatics."

"The T-Mobile MyTouch 4G comes equipped with a second-generation 1GHz Snapdragon processor, and the smartphone was very responsive during our review period. Applications launched immediately, and multimedia performance was just fine."

A lot of low-end phones are limited by performance, and the reviews state so, but that's to be expected given the price point and intended userbase. When a phone shines, though, the editor's rating generally reflects it too.