The only racing sim I've ever played was F1 2001 (or was it 2002?). Anyway, all the above points are spot on, except I'd have to differ on the limitations of the dual shock. I found the analog stick for the PS3 plenty subtle enough once I got the hang of it, same with acceleration and braking.
The problem I found was the analog stick wasn't able to handle the tightest of hairpin corners. I'd always have to bump around the tightest hairpin at Monte Carlo no matter how slow I was going.
You're never going to win the GT driving academy without a wheel. But you'll still be able to achieve good results and have a satisfying time without making the driving wheel investment. And given this is a beginner's guide I'd suggest true beginners for driving sims have a go with the standard controller and decide if they like the sims, or prefer the arcade style games before deciding to buy a wheel.
“The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.” - Bertrand Russell
"When the power of love overcomes the love of power, the world will know peace."
Jimi Hendrix
