nag-okay sya mga last week ng jan, tapos ngayon tinopak na naman nung feb
daemonite, on SmartBro over here in Fairview, we only had a lag for a few hours after the quake but we were never cut off. The lag was more on the sites being accessed, including Google. The one that caused a signal loss about two weeks after was what they called a signal loss at a base station, the structure which our antennae is directed to. After about 6 hours (and some 45mins on the phone just to get to a customer support rep to talk to: their tech support leaves much to be desired, no doubt), we were up and running again.
Meanwhile, over at a Dos Workx branch 5 mins away (on PLDT DSL) the week after the quake, they still did not have internet access.
Just a heads up; if your business is based on PLDT's service, I think you should not have doubts about switching. Although they are of the same company, the technology may contribute to the stability, or instability, of your service. When they gave you a rebate, the stress and other non-financial loss you experienced were not even properly compensated, so why stick it out? In my opinion, you'll still be experiencing the same, given the track record.
Other servers to consider, based on user feedbacks (read: friends of mine) are Bayantel/DSL (my guess is selected areas only), Destiny Cable (faster than wireless), Eastern (most stable, most expensive). My two-cents.