New internet, not getting close to 2.5gb

[wireless]

Hey,
So we signed up for internet on the 7th and we selected their 2.5gb internet as it is the best offered. The best we have seen is 1gb download. I called and talked to Telus and they sent their technician back in to check and he said everything looked good.

Is there a chance that we have the wrong parts installed?
Also, all the Ethernet cables they used were CAT5, and I am under the impression that for 2.5 you need CAT6?

Any help would be awesome,
Thanks!


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