I ordered a 10m HDMI cable which was labelled "highspeed" and got a cable with the "standard" label. When asking the store, they told me, that HDMI cables, which are longer than 7.5m can't be highspeed anymore, starting early 2013.
Is it true, that a cable could lose its "highspeed" rating either because it is too long, or because the standard changed?
EDIT: The shop told me, that for all cables, which are longer than 10m, "highspeed" is the new standard and that they don't sell "standard" cables anymore. He insists on the fact, that the cable is a "highspeed" cable although he isn't allowed to print it on the box.
I returned the cable to get a cable from a more reliable shop...
I'm aware of the questions HDMI-HDMI cable length and Length limit for HDMI cables, but my point is a bit different.
I'm also aware of the FAQ on hdmi.org, which explicitly states, that the standard doesn't specify any length. Unfortunately, this FAQ seems a bit outdated/badly maintained.