Is PLDT DSL slowing down?

About a month ago, I posted an article praising the performance of our PLDT DSL connection. You can read more about that article here. In the speed test results that I have posted, the connection averaged about 4.9 Mbps. In the past few weeks, however, the connection can't seem to get to 4 Mbps. And, yes, I turned off Wi-Fi to the other connected devices and checked the PC was not running any updates. I have tested in a span of multiple days and the connection is now averaging 3.5 Mbps. Is PLDT DSL slowing down?

Here's the latest speed test that I performed. This is the best of 3 tests for today:

Are you guys experiencing the same?

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