"surely some words will worm their way into standard English?"
... by that time, with luck, I will have passed my 'sell by' date and won't care, except for my niece and nephews and their children, living in a society that seems only to go from bad to worse.
(When I was younger, dropping litter would get a sharp rebuke, but these days, one doesn't know if a 4 foot nothing "thug" is carrying a knife or gun, so it is rather more dangerous to try to encourage "standards" to be kept.)
Some (not txtspk) words from the internet have crept into daily use of English, where "Googling" may be used for "searching", and "log on" is used in some instances where "visit" would be more appropriate. One only needs to log on with a username/password or e-mail/password on a fraction of the world's web sites, where individual users are either having to pay a fee for access, or where trust in "keeping to the rules" is expected, and revoking access is the first (or only) sanction which can be applied.
Unfortunately, if txtspk is the "norm" for younger people, on mobile phones, FaceBook and other sites, their 'blogs' and via any instant messenger facilities, then spelling ability could be degraded, and job prospects (for quite a number of years, while management or HR have mature staff) will be lower.
I think the impression of being unable to string a grammatical sentence together will do no good for those who regularly use txtspk, and yes, "thick" might be a bit blunt, but might be the impression some get.
I know I would not consider someone who put any txtspk on a job application or covering letter, because they may slip into it when dealing with a customer and lose business.