I'm behind 10 pages since I last posted but I'm pretty sure no one has moved from their opinion of what Scripture teaches, but it isn't at all unproductive. If nothing else, this provides insight into why others believe so differently.
You've extrapolated 1 Corinthians 2:14 as you've understood it and why you are confident it is not my interpretation.
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14The natural man does not accept the things that come from the Spirit of God. For they are foolishness to him, and he cannot understand them, because they are spiritually discerned."
However, v. 6 leads into the discussion with, "Among the mature, however...7we speak of the mysterious and hidden wisdom of God...12We have not received the spirit of the world, but the Spirit who is from God, that we may understand what God has freely given us..."
There is nothing here that specifically indicate that we receive the Spirit who is from God before we believe, but only that once we receive the Spirit who is from God, we are able to understand the mysterious and hidden wisdom of God by receiving the Spirit who is from God.