Speed now officially a Google ranking factor
But panic not, it’ll only impact “less than 1% of queries”.
Even with the lack of specificity of that phrase it doesn’t sound like it’s going to impact majorly.
Will it become more important with time? Probably but I’d guess it’ll still only be an issue for the worst offenders.
So watch your speed, but you were doing that anyway I hope?
Search Engine Land coverage. http://searchengineland.com/google-now-counts-site-speed-as-ranking-factor-39708