It would be very good for tests with many test results to initialize the values for total, pass, failed and skip from the testng result tag.
For example to show the following testng-result.xml with from a job with many testcases, without writing a test result for each testmethod.

<?xml version="1.0" encoding="UTF-8"?>
<testng-results skipped="0" failed="0" total="245600" passed="245600"/>