I think that it must be what we expect in theory, but in practice i'm still thinking that a Very good performance of a DST, with high DP and disturbing completely the formation, within 2 o 3 days of test, you can gathering a lot of information, characteristics, pressures, reaching a pseudo steady state, usefull to determine a very realistic PI. I mean, well test provide answers from the original dynamic response of the reservoir, instead analytic calculations with fisic equations. However, both methods allow you to get an idea of "expected orders of magnitude" of the reservoir's PI.