These are purely my observations on this topic, they are not intended at anybody.
I have no objections to using "text speak" or any other derivative of our colourful language, however I do feel there is a right time & place for each variant.
I have received job applications written in such a manner and, unfortunately, these candidates were not considered as they would be responsible for corresponding with clients.
I was also taught to use correct spelling, etc but I do use "lingo" when sending a text and occasionally in emails (depends upon the recipient). My Mum, at 76, also uses it to "talk" to my daughter & son who think their Nan is "cool".
On another note, it is the lack of originality in speech that winds me up. How many times while watching TV do you hear some-one begin a sentence with "Basically". If it's basic why are you explaining it?

Also the abundance of adjectives that begin with the letter F.
I'll get off my soapbox now
Dinie