It is dangerous to measure the blessings of God with a material yardstick.  It is sobering to realize that the fact that people are preaching in the name of Jesus and having success isn't evidence that God is blessing the work (see Matthew 7:21-23).  At the end of the day, everything we do must be tested.  But the test isn't how much money we've put in the bank or the number of people who attend the services each week.  It sounds like a hard line, but it's absolutely essential in this world of illusions and counterfeits that we test every result we obtain and every answer to prayer that we receive by the Word of God.