Speed Test
I feel that is the most accurate speed test on the internet today. If that test repeatedly tells you that your speed is 1515 Kbps download and 534 Kbps download, then that's likely what it really is.
By the way, I took that same test and it reported 195kbps when it should have reported 1324Kbps - I performed the same test on other sites (other than mine) and has similar results which indicate to me that the test you mention is inaccurate.
Best regards,
Jim.
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