No.. this means, that if you want to submit your phone for warranty, you can flash back to the stock firmware! The flashing procedure is not same! To recover, do the following:
1. Download clockwordmod recovery from here:
http://koush.tandtgaming.com/recoveries/recovery-clockwork-2.5.0.4-galaxys.zip
2. Rename it to "update.zip" and put it on your internal SD card.. Don't put it inside any folder.
3. Download the stock firmware nandroid backup from here:
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4. Extract it and put it into your internal sdcard (I'm not sure about the directory structure on the zip file my friend uploaded.)
5. Power off the phone, then boot into recovery mode by pressing Volume UP + Home + Power button simultaneously.
6. When in recovery, use volume keys to navigate to "Apply update.zip". Press home button. Your phone will now boot into clockworkmod recovery.
7. Use the volume keys to navigate to nandroid. Use the back soft button to select. Then chose restore, and restore the ROM.