No. On TV you see nadals ball spin so much on slow mo.
Then when you hit, your ball spins the same amount as nadals ball in slowmo xD imagine non slowmo.. How does he get all his spin. I even tried the reverse forehand (so hard to time properly) but im not getting near enough spin for the ball to curve just a tiny bit.
low to hi swing is a major component but it's not the only one. There's low to hi swing, timing, angle of racquet face at impact, laid back wrist and racquet in front for leverage, loose arm for max head speed, weight swift, wrist flick (by forearm pronation), upper body rotation etc, new poly strings, an aero pro (which is good for spin although i dont know why exactly), good plow through to dig into the ball before it leaves the strings, some lead at 12 to help accelerate the head. all these things timed precisely come into play. nadal's got it all.
racket HEAD speed is also very important. and with head I do not mean the handle but the tip of the racket. try to make the tip considerably faster than the hand by pronation and wrist action.
if you just rip the hand through you will generate flat shots. nadal has a steep swing path but the main reason for his spin is because he has the highest racket head speed of all players (fed might be close).