That -entirely- is in the "it depends" category. We use full-disc-encryption primarily for added security in the case of stolen and/or misplaced laptops.
There's no escrow of the passphrases - but this is not show-stopper because we've got unencrypted backups of the content. Yes, this means that a forgotten passphrase is now a problem almost on par with a crashed hard-drive. (I say almost because no replacement hardware is needed)
But all companies are (or should be!) equipped to deal with a broken hard-drive anyway. Why is "hard-drive cannot be read because hardware is broken" acceptable in a company while "hard-drive cannot be read because the passphrase is unknown" unacceptable ? The consequences of the two situations are after all pretty close to identical.