Here is some info I found
Internet Explorer imposes a time-out limit for the server to return data. By default, the time-out limit is as follows:
Internet Explorer 4.0 and Internet Explorer 4.01 5 minutes
Internet Explorer 5.x and Internet Explorer 6.x 60 minutes
Internet Explorer 7 and Internet Explorer 8 60 minutes
When the server is experiencing a problem, Internet Explorer does not wait endlessly for the server to return data.
>>"Applications that use the WinINet API directly will experience the following ReceiveTimeout values:"
WinINet.dll version 4.x 5 minutes
WinINet.dll versions 5.x and 6.x 60 minutes
>>"WinINet.dll versions 7.x and 8.x 30 seconds" (So I am assuming pascal uses the wininet.dll in windows?)
You can locate the version of WinINet.dll in the %windir%\system32 directory.