Well, our website deals in estate planning in England and Wales. start of the year they were spending thousands on AdWords. 90% of traffic was coming from there.
In Feb they started with proper SEO with blogging (still needs a lot of work on the site) and social media. Current stats show that only 35% of traffic now is through AdWords. 26.5% is organic searches, 16.5 direct and 21.4 is social.
We're hoping in another 3 months we can get rid of adwords completely, rebrand the website to make it more SEO friendly and keep pushing.
Adwords can work alongside SEO, it can give you a boost, but ultimately, you want SEO to take over and Adwords to drop off. Once SEO is done with good quality content, it doesn't cost anything other than tweaking here and there. Adwords, is a constant charge.