Yep, I am sure that is factually correct. However, I had a play around with various different main weapons last night, and with the exception of Elite Vipers whos shields seem virtualy impenetrable to MC (not much better vs Beams), I really couldn't tell the difference in overall splat time. Ammo is not important to me, the cost is negligible and I never camp for long.
Experts will have a vast array of weapons and tactics for the various situations, new commers OTOH might not find the fiddling about with power levels and heat very helpfull.
It is easy enough to trial out your load outs and see what suits your fighting style and level, especially with all the new interdictions, you dont even have to go out of your way.