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Maybe I’ve got a bad copy of the 55-250 but mine is so soft on the long end that I can see it even in the viewfinder and needs stopping down to about f8 before it gets acceptably sharp. Also my point was that the kit lens isn’t hot, especially if you use it as a fixed f5.6 compared to a fixed 2.8. At 2.8 you will let in four times the amount of light meaning you can use a quarter of the shutterspeed which is not to be sniffed at. It doesn’t help with IS if you have to go to 1/20s shutter speeds since your subject will have moved during the exposure. I would much rather take a tamron 17-50 than the two canon kit lenses together because if you have the option of 2.8 on the long end you can always stop down for more sharpness and contrast, neither of which are amazing on the kit lenses wide open. At f8 they are fine but wide open not so much. Then with the large aperture primes you have another two stops. I think you should probably point this out in the article as you’ve entirely left out the effect of having the ability to close down the aperture for better sharpness or leaving it wide open for better shutter speeds. The larger aperture will also make your flash photography easier since you can dial down the power on the flash and thus getting shorter recycle times. Fair enough on the ability to change the perspective but I’m not a fan of portraits at over 200mm since the perspective starts to get a bit funny.
Alexandra, for a sec I thought they had hired on that Cain guy