Speech (in any language) often leaves bits out:

"And Mr. Zuckerberg, quite a story, right? [You went from a ] Dorm room to [becoming] the global behemoth that you guys are. Only in America, would you agree with that?"

Any native speaker listening to that senator would have understood the phrase that way or in a similar way. In other words, speech can be very different from written language.

Some of the ways it is different are (those are taken from the paper cited):

filled pauses - noises made by the speaker that don't correspond to words (ah, uh, um, etc). • restarts - repeating a word or phrase. The original word or phrase may be complete or truncated. • interjections - extraneous phrases as in "on line thirty, I guess it is". • unknown or mispronounced words • ellipsis • ungrammatical constructions - Users make errors of agreement (sub-verb, number, etc) and may use constituents in unusual orders ("to the utilities cell add fifty dollars")

A dorm room means a room in a college or university dormitory.

real speech

Speech (in any language) often leaves bits out:

"And Mr. Zuckerberg, quite a story, right? [You went from a ] Dorm room to [becoming] the global behemoth that you guys are. Only in America, would you agree with that?"

Any native speaker listening to that senator would have understood the phrase that way or in a similar way. In other words, speech can be very different from written language.

Some of the ways it is different are (those are taken from the paper cited):

filled pauses - noises made by the speaker that don't correspond to words (ah, uh, um, etc). • restarts - repeating a word or phrase. The original word or phrase may be complete or truncated. 

• interjections - extraneous phrases as in "on line thirty, I guess it is". 

• unknown or mispronounced words 

• ellipsis 

• ungrammatical constructions - Users make errors of agreement (sub-verb, number, etc) and may use constituents in unusual orders ("to the utilities cell add fifty dollars")

I would personally add to that list: truncation, where the speaker doesn't say something in full.

A dorm room means a room in a college or university dormitory.

real speech