That is, they survey the system or new install and then make reccomendations.

As to your speed, that's about average for many networks. It's a crowded space and you take speed up with the IT folk.

As to the IT corp, you may be sending the message to the wrong person. I find that if costs are going up due to a poor system, that's something your CFO, COO and CEO want to know about. Not the corp IT. The corp IT mandate may be to keep his budget in line. Even at the cost to other groups.
Bob