Richardw, 750 miles is long-haul (under 750mi is short-haul; when DOT determines the figures, there is no medium-haul).
777d, South Florida-New York has roughly 81 daily flights from the three South Florida airports to the four NYC airports.
TWFirst, that would be great if CO did do hourly shuttle EWR-FLL service. I wonder how AA would respond. They currently offer 20 daily Miami-NYC flights, but to various airports (9x MIA-LGA, 5x MIA-JFK, 3x MIA-EWR/FLL-LGA).
DCA-ROCGuy, I agree. Florida is an important market none the less, though. Miami is a huge business market, as you stated, and Tampa is not that small a business market either. MIA-TPA also get's a lot of business travel, and then there also the intra-State routes to TLH, which do well yield wise thanks to last minute runs to the capital. Other than that, though, it's not great yielding.