I'm calling bullshit with you:
http://bitcoin.stackexchange.com/questions/8031/what-are-bitcoin-miners-really-solvingUsing this all steps are 76 Bytes in total for the entire process. Now multiply this by 11 block erupters then multiply 4 bytes by every second each day:
60 seconds *60 minutes *24 hours *4 byes per timestamp = 345,600 Bytes or 337.5 Kbytes flat bandwidth consumption per block erupter in addition to the 76 Bytes expected per share every day. expected revenue per BE is 0.0003 btc per day until the next difficulty bump: .0033 is expected for 11 Block erupters.
BTC guild has a pps rate of 0.0000000452606264, therefore, .0033/0.0000000452606264= 72911 shares roughly (as per a pps structure...I know this is sort of hacky because they set the pps rate, its not set by some arbitratry fixed constant, this is an estimation)
76*72911= 5,832,884.36 expected shares bandwidth of 11 BEs+ 337,500 fixed timestamp bandwidth= 5,878,736 Bytes per day which is approximately 5.74 Megabytes per day consumed from bandwidth of 11 block erupters.
5.74 MB consumed per day*1024 to convert to KB /24 hours per day/60 minutes per hour/60 seconds per minute= requires a 0.0680409259 KB/s internet connection to run.
Tell your brother that there is no way in hell or anyplace else that 5.74MB*7 days = 200,000 MB.
Tell him that your devices pull just over 40 MB per week.