not even a blip in the regular Google organic search traffic pattern for TFSA over that period.
There is plenty of anecdotal evidence that 2010 algo changes had an impact at the fringes particularly long tail traffic but the heart of SEO, it's traffic and the make up of the traffic has remained very stable.

The Title and Link are two of the most important aspects of SEO. Working your keywords into them are important

According to my knowledge Google does not use meta titles at all any more for ranking as well as description and keywords

What is your thoughts on the above ?
Meta title tags and Descriptions should be used as a point of differentiation in the SERP's(Search Engine Results Pages). Use them to make an impact, eg instead of saying Carpenter Cape Town say "Cape Town's best Carpenter - Guaranteed Quality"
then in the meta description write a classified ad using 160 characters. In general Google display around 160 characters so you may as well use up the space they give you. This Meta description displays in the SERP's under the title. Both Meta Titles and Descriptions DO count towards the algo calculation but their weight has been reduced. In the above example the phrase Carpenter Cape Town is still within the proposed Meta Title though not in the same order, this is fine for SEO purposes AND helps you attract more clicks by selling to your customer instead of informing.