Telebanc Financial Corp. announced results last week that put it in a class by itself among community banks.

The $2.3 billion-asset bank, which exists solely on the telephone and Internet, boosted fourth-quarter revenues 120% from a year ago. The results make it a star of the community bank sector, where the median revenue- growth rate hovers around "the mid-single digits," according to Kevin Timmons, an analyst at First Albany Corp.

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