Ranging from 13 to 17 inches in screen size, the notebooks ship with the brand-new Thunderbolt connectivity standard that Apple co-developed with Intel.
Thunderbolt can transfer up to 10 Gbps, which is theoretically 12 times [...]
Source: http://www.wired.com/gadgetlab/2011/02/new-macbooks-get-faster-chips-thunderbolt-connectivity-port/
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