Great Tip!
I've definitely heard that the bavarian Weizen yeasts (the pure ones, some sold are a blend) will produce more bannana at the higher end of the temps and more clove with a restrained bannana flavor at lower temps.
I cranked my fermentation temps up on my first weizen (and first beer ever) using an immersion heater and I ended up with TONS of bannana but also lots of phenolics that I really didn't like.
I didn't really know how pitching rate would affect the flavors, so another great technique to keep in my back pocket.
Adam