Welsh broadband subscribers are being invited to take part in a survey geared at establishing their true broadband connection speeds.
The Wales on Sunday has launched a campaign to raise awareness of broadband deal performance issues, and is urging customers to assess their own service quality.
According to the national newspaper, broadband users should be aware of whether they are "on the internet superhighway, or a virtual cycle lane".
Media regulator Ofcom has been investigating UK internet service providers over the download speed claims made in broadband advertising.
Concerns have been raised that the headline speeds used to promote certain broadband packages are only available to a small number of customers, with downloading capacity being far lower in the majority of cases.
Ofcom says the average advertised broadband speed is 13.8Mb, but UK consumers currently receive an average of just 6.2Mb.