Some of the recent ones I had noticed that were upheld:
David Tenant VM ad "Say goodbye to buffering" - Ad now banned
http://www.asa.org.uk/Rulings/Adjudi...DJ_201412.aspx
“Average download times with up to 60Mb broadband Album 9 secs TV show 54 secs Movie 2.5 mins HD movie 10 mins“ Ad on their website - ASA found to be misleading due to traffic management.
http://www.asa.org.uk/ASA-action/Adj...DJ_194077.aspx
The complainant, who did not believe the small print was legible, challenged whether the ad was misleading.
http://www.asa.org.uk/Rulings/Adjudi...DJ_186497.aspx
There are many more ASA complaints which where upheld, probably 10 or more already this year alone that. Yet I havn't seen one for advertising upload speed upgrades by summer which then took 18 months, along with the speed doubling and similar stuff.