This does make sense I think, after all, there have been a number of official announcements that have amounted to policy statements, the problem has been that on matters, for example like tax, the position has very much been "wait and see" and that is what has been given more prominence than anything else in some respects.
This said, spending lots of money on a poster campaign could be a dangerous thing to do as well if Brown is simply spinning CCHQ into panic-driven action. Assuming my understanding is correct, there are national expediture limits for elections by parties under the Political Parties, Elections and Referendums Act 2000.
A political party which contests all the seats in the United Kingdom for election to the Commons is able to spend £19.77m. The limit for parties contesting seats in Great Britain only is £19.23m. These limits apply for 365 days before the date of the election.That 365 day period could be crucial. The rules are weighted in the favour of the Prime Minister as only he can know when he will go to the country, and he can also know how much money he has spent so far. An Opposition, in comparison has to be careful, because if what it does can be seen as election campaign spending then it could find itself caught short.
So, if the current fever of speculation is wrong, but the Tories spend lots of money on campaign material, they could find their spending capability limited if Brown then calls an election early next spring. All this rumour and speculation may very well just be a means of making the Tories panic-spend to reduce their ability when the real time comes. Even if what they;re spending now is exempt fromt he rule, it still drains the kitty a little.