OLD ISP:
$ iperf -p 65000 -c iota.bysh.me -t 60 -P 4 -d
[ ID] Interval       Transfer     Bandwidth
[SUM]  0.0-60.9 sec   211 MBytes  29.0 Mbits/sec
[SUM]  0.0-61.0 sec   432 MBytes  59.4 Mbits/sec

$ iperf -p 65000 -c alpha.bysh.me -t 60 -P 4 -d
[ ID] Interval       Transfer     Bandwidth
[SUM]  0.0-60.8 sec   174 MBytes  24.0 Mbits/sec
[SUM]  0.0-61.1 sec   578 MBytes  79.4 Mbits/sec

NEW ISP:
$ iperf -p 65000 -c iota.bysh.me -t 60 -P 4 -d
[ ID] Interval       Transfer     Bandwidth
[SUM]  0.0-60.3 sec   301 MBytes  41.9 Mbits/sec
[SUM]  0.0-75.2 sec  2.50 MBytes   279 Kbits/sec

$ iperf -p 65000 -c alpha.bysh.me -t 60 -P 4 -d
[ ID] Interval       Transfer     Bandwidth
[SUM]  0.0-61.1 sec   191 MBytes  26.2 Mbits/sec
[SUM]  0.0-66.9 sec   117 MBytes  14.7 Mbits/sec