The total time for a test class should include the configuration methods.
Otherwise the total time reported can be quite confusing, because it's much lower than expected.

E.g. I have on the test overview:

Class: a.b.c.SmokeTest, Duration: 472 msec

but when I drill down to the test, I get:
Test Methods
testStartup, Duration: 472 msec

Configuration Methods
springTestContextPrepareTestInstance, Duration 6 sec 348 msec