True, Jehovah's Witnesses do NOT follow Russell, they follow the Governing Body. And if numbers was a sign of God's blessings, then the Catholics are the True religion.
its really the 'fruits' of a religion that demonstrate Gods blessing as Jesus himself stated
Matt 7:20 Really, then, by their fruits you will recognize those men.
21 “Not everyone saying to me, ‘Lord, Lord,’ will enter into the Kingdom of the heavens, but only the one doing the will of my Father who is in the heavens will.22 Many will say to me in that day: ‘Lord, Lord,+ did we not prophesy in your name, and expel demons in your name, and perform many powerful works* in your name?’ 23 And then I will declare to them: ‘I never knew you! Get away from me, you workers of lawlessness!’
its about quality of worship... and if their is quality there should also be growth, but growth alone is not an indicator of quality. Most catholics are born into the religion as is the case with many religions.