do animations increase the page load time??

Answer 1

YES. Emphatically, YES.

EXAMPLE: IF you have a completely finished and polished web page then ADD a silly_cat.gif, you have INCREASED the amount of data your visitors will have to download. Unless that animation killed your browser or graphics card and refuses to download it, but then you might as well not have bothered with it.

If you actually wanted to know how load times of various animations compare with each other, or what types of animations there are, refine your question. OR check this out:
http://graphicdesign.stackexchange.com/questions/90/what-formats-supporting-animation-are-suitable-for-the-web

@Jack Sully Some browsers do not handle certain animation types well (or at all) but the answer is still YES. Not, "NO, in certain situations..."

Net speed or the amount of bandwith you (the webpage owner or visitor) have has nothing to do with the difference between... anything. Unless you think that .silly_cat.gif will somehow get caught in a bend in someone's CAT5 cable or float off, lost in the aether, during wifi transmission.

PC speed? CPU or procesor speed would have little to do with differences between animations but the .gif may get mangled in the graphics card, though...

Answer 2

How can I animate text?