Speedtest.net inaccuracy?

[Christmas themed thank]

Speedtest.net consistently shows speeds higher than my sync speed, regardless of computer used. I've tried a bunch of servers and the same thing happens.

What is going on here?

 

[bremen1874]

VPN running?

 

[KIA]

Security software?
Different browser?

 

[HoneyBadger]

Running over wifi?

 

[Christmas themed thank]

Ethernet. Using a variety of Macs.

 

[Sp00n]

How bad is the discrepancy?

 

[varkanoid]

Dont use it as an exact measurement use it rather as a guide.