This paper deals with the problem of limited domain speech synthesis. Some experiments show that the segment variability is extremely large for unlimited speech synthesis. It seems that it is practically impossible to colllect the text corpus large enough to cover all combinations of even very coarse features. A natural question arises whether restricting the synthesizer to a specific domain can help to increase segment coverage. This paper provides an analysis of several limited domain text corpora and evaluates their applicability to the problem of segment selection for speech synthesis.