It is my opinion that someone who claims to have a masters in computer science shouldn't say they have 1000 millibitsecond burst. Except if it's actually true, but then writing 1 bit per second would be a lot less redundant.
Since bits are different from your usual metric system in that bits are discrete, a millibit doesn't make sense because you can't have partial bits. A bit is a bit.
Thus, it's not unusual to see the term mb to refer to megabit (though, what the heck is a megabit-second? Speed isn't like power).
That said, an OC-24 line is intense - over 1gbps - and would probably cost millions per month for a residential place. It's also about 2x a usual ISP's line for a regional area, which is OC-12, and half of an ISP's usual backbone line, which is OC-48. Most computers don't even have the proper hardware to use anything over 1gbps, and even then, your transfer speeds are limited by hard disk write/read speeds, unless you have a huge number of hard drives operating in RAID and striped parallel... it's ridiculous how much it would cost.