Omg stop!  You are just making too much sense here. The reality is that the rail won't increase business and grow the economy the same way roads would.  Your pointing out the pointing out the difference and dispelling his eronious and desperate attempt at trying fit the square peg in the round hole is greatly appreciated.   It is this type of misinformation that has me wondering if people are spreading stuff like this on purpose or if they really believe it.  
For those of you familiar with the simpon's television show there was an episode where their city builds rail with promises of it being the best thing ever until marge Simpson goes to towns where the rail was built previously and finds them in ruin.  Seems very similar to the enlightening truth about San Juan and Puerto Rico that you talked about earlier.