i recently upgraded to Comcast 50mb/s service... but im only getting 6.7MB/s on my browser, utorrent, steam etc...... is there a difference between mb/s and MB/s?.... when i called them, they told me i should be getting at least 30mb/s or 30MB/s ( not sure which one because they didn't specify)... i scheduled and appointment with one of their technicians to see if there is a problem with the connection.. should i cancel???? what speeds should i expect from my connection.. thank you