In 2010: When playing back the score from the score (ambient playback), the reverb level, even when at 'zero', was equivalent to a setting of '60'. However, when using the "Export to Audio File"...

if you've composed to soft-synth voices and then convert your score to Garritan voices, you will go "Ech!" and will have a lot of work to do. Better to compose to the Garritan voices from the...