Yes, I agree - extremely laggy - really poor to be honest.
Also having issues connection to the network - I am on 02 and my phone keeps dropping out and then won't reconnect. Then says phone doesn't recognise the sim card - maddening really as I have had the phone for 13 months!!!!!!!
NOT happy with ICS so far - maybe when the bugs are ironed out it will be fine, but I think that HTC should have tested this more thoroughly - these OTA upgrades are always a pain - if you buy a new phone with ICS already installed it usually works fine - the OTA updates however are frequently a pain!!!
Not happy with this at all and NOT doing a factory reset - why should I have to do this for the update - a complete pain. The update should WORK FLAWLESSLY, and not need customers to reinstall everything!!