Your office connection is probably scaled well. If it was as fast as your home broadband it would mean your company overpays for it and actually looses productivity.
Office work does not require fast Internet access and does not require that your Youtube videos load instantly.
We did some research and it seems broadband Internet access does not improve productivity and may actually reduce it.
Any minuscule increase in productivity (I mean a total of 5 minutes of loading times per employee per day) is meaningless. People can't focus on their real work for 8 hours straight. When Internet works faster, people just use more of it and are less selective about how they use it. People also get quickly used to increased performance and will be complaining at almost any performance point.
Another research on build times showed that hugely increased build times don't improve productivity either. At first yes -- people get excited. But then, when build times are very short (say 5s compared to 10m) most (but not all) developers just stop staring constantly at their IDE and thinking about how to structure their code and instead reduce their iteration to a minimum (say couple of lines of code) and just restart to see if it works. This seems to actually reduce quality of produced code.