I've researched this extensively and the consensus among respected scientists in the field is that the tsunami generated by such an event would be about one meter high by the time it reached the Eastern seaboard. The worst case scenario would appear to be an additional high tide that day.
Not that I doubt you, but I'd love to read up on the science on this issue. Got any science links? I've watched the discovery channel, et al, who claim that slide "could" do that. Obviously it's a worst case scenario. And yes, it's most certainly overblown. I would love to read up on any SCIENCE that supercedes "opinion". I assume this is about the Canary Islands issue. If it all goes at once, we certainly may have a problem, how big, shrug. Any suggestions welcome. Course, I'm happy that I work at 54 Feet and 7 miles from the east coast and Live at 1250 feet, 45 miles from the coast :). I could get home in time, hehe.