Oh god yes, big number mean bugger all.
Examples of some of my Audio setups on my PCs...
My KD7 has a Genius thingy, its supposed to be 1400w and I have to say, that its utter poo... I will never buy Genius Speakers again.
My DFI LP250 has Altec Lansing 251, these are many many times louder, and many many times better quality too, but they are only what? 15watts? I am not sure right now, but google for them, they are very low anyway.
Those altec 251s are leagues ahead of the genius.
Now, I put those 2 sets together because they both cost me £50
Even further apart are my Altec Lansing 955. These are double that price, but also they are THX verified, plus the output is only 15Watts, now the quality of that, is leagues ahead of any of the others, plus the volume is mind numbing, and even when pushed right up ( Never gone anywhere near full volume cos its too painful ) it still keeps 100% crisp and perfect quality... On only 15Watts!!!!!!
Among others too, are a JBL Dolby Digital 6 Channel setup, that cost my father nearly £600 ( Duly stolen by myself and my mum cos she is sick of the noise ) and those are extremely expensive, and extremely loud, however, the quality is pretty poor when compared to the AL955's.
These are just a few of what I have, but the simple fact has remained across the board, and across all speaker/amp setups I have, and have had, and that is that more watts means sod all, and in fact, its often a complete lie really, and also when comparing say the JBL against the 251... £50 vs £500, I wouls say that although the JBL are way louder, the 251 are also way better quality too.
End of the day, dont listen a sodding word on the packaging, have a listen to the hardware yourself and then judge afterwards.