i think beta is going to start either on the 15th of february (friday) or on the 18th of february (monday) ... thats around mid february... and then the beta goes for about 1-2 weeks till the end of february..

25th february is too late for the announced "mid" february.. and especially when the beta should run for 2 weeks.. and then 2 weeks for the dev team to work on it till beta in mid of march.

so i say its going to be either the 15th or the 18th