Yesterday Claro had problems, I'm pretty sure it was network wide.
I called to file a ticket and asked if they were having network wide issues but they denied that. I talked to other people I know on Claro and all of them were having problems as well.
At 12AM last night the issue stopped (I was online and feverishly checking my network).
Do not use:
Mide tu velocidad - Claro or
Speedtest.net by Ookla - The Global Broadband Speed Test they are not good measurements. I checked those and it kept saying I was getting my full speed of 10/mbps (when in reality I was barely getting 56k speeds!)
Use:
TestMy.net Broadband Internet Speed Test which gives you the real results of your download and upload speed.
I also started to download a large file of over 1GB and monitor my network. When waiting on hold with Claro support I was getting <20kbps. Once the Claro tech was on the line with me and I told him my internet was extremely slow, my download shot up to about 100kbps - so they definitely had some way of giving priority access when this problem was going on.