Is Speaking in Tongues The Initial Evidence of Spirit Baptism?

This week Dave Edwards and Steve Bremner try to cover the subject of speaking in tongues, but this time from the angle of asking specifically if speaking in tongues the initial evidence of Spirit Baptism?  Steve says yes, pretty much always, while Dave says almost always, and take it from there basically and politely sort through our differences in a way that hopefully you will enjoy. We cover the usual passages this topic elicits, and look today in depth at Acts chapters 2, 8, 10, 15, and 19 mostly and had little time for much else, so it might be a topic we revisit in the near future, and spend a little bit of time in 1 Corinthians 14. What does "do all speak in tongues" mentioned in passing in 1 Cor 12:30 refer to? Are all tongues created equal? Does the Bible really say that one needs an interpreter every time they speak in tongues?