I'd say it's inevitable, although I've been with EDF since it was London Electric and their online tariff for me (online v4.1) can't be beaten for my usage. Even now, using the comparison websites the companies who have dropped their prices can't beat online v4.1, but there has only been one increase and not by as much that non-online customers of any company have had to pay. So I'd say if EDF do drop their prices, it won't be by much (if at all) for online customers.
Like Martin says though, WAIT!!
but be careful as there's no standing charge so you pay more for electricity and gas. .
New plans have just been announced by the Government
DON'T assume your landlord covers you
Incl £2ish sun cream & £1.50 disposable BBQs