I know I'm a little late with this post, but I really can't stand what some of you write as facts.
First of all, change in signature sizes will not change site speed at all. For the web server there's no difference between these signatures:
Code
[img]http://host.ip/10kb_sig.png[/img]
Code
[img]http://host.ip/1000kb_sig.png[/img]
So, calculations like this one:
Quote (Juggalo_Mole @ 31 Aug 2010 08:41)
We have 590,812 registered members
40kbs x 590,812 = 32,632,480
It adds up.
only deserve words that could earn warnings for excessive flaming.
Again, from site's point of view, there's no difference at all.
Now, about users with so-called slow computers. Do you even know how much cpu time does it take to load a single image with size of 150kB? No? It's because you don't notice it. Slow computers 10 years ago would have no problems with showing 25 (max. posts/page) 150kB signatures at once.
The only legitimate argument here is bandwidth saving for users with slow connections. But guess what!
PS: I don't argue that it's impossible to contain most, if not all, graphics within current limits, but that it may prove too tedious or ugly for most users, like it has for me.