The current Fibre Channel standard is 1Gbit per second, (100MByte per second). The next generation will be 2Gbit per second (200MByte per second). Future speeds will go to 10Gbit per second (1GByte per second). I hope this makes it clearer. You are correct in that 2Gbit will really be 200MBytes.
Some terminology refresher:
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This was first published in April 2001