How to speed up airport making wifi connection after mac wakes up?

Hi,
I have the latest 27" iMac (2011) with the highest spec. I could buy from the Apple Store. (except that I don't have SSD).
When I wake the Mac from sleep mode, it takes 5 - 10 seconds for airport to find my home WiFi signal. I'm now in a house where I have to use WiFi, but even when I was connected to the internet via an ethernet cable in my previous house, it took the same amount of time.
This is hardly the biggest Mac problem in the world, but if there is a way to speed things up, that would be great (when I turn my iPhone or iPad on, for example, I don't have to wait for a connection - it's pretty much already connected).
By the way, my internet network is digital and super fast. Also, I consider myself a computer novice so if any suggestions could be simple and clear, I'd appreciate that.
Thanks a lot in advance.

Kelly:
Glad a re-install solved your issue. However, it is not the only, nor is necessarily the best solution to some issues.
In terms of the re-install one should always backup the Users Folder, if you have any data on it, and any third party apps you want to save.
Again, I am glad your issue was resolved to your satisfaction.
Good luck.
cornelius
PismoG4 550, 100GB 5400 Toshiba internal, 1 GB RAM; Pismo 500 OS X (10.4.5)   Mac OS X (10.4.5)   Beige G3 OS 8.6

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