Zoho Mail has become VERY SLOW to load Emails over Past Week

Zoho Mail has become VERY SLOW to load Emails over Past Week

Over the course of the past week, (since about March 26, 2012) Zoho Mail
(which I use under any of 4 major browsers on a Windows 7 PC)
has become very slow.  Are some servers down in India, or is Zoho
 throttling free email usage?  Has anyone else noticed this effect?
 
I constantly get "Loading... please wait" when I click to load an email, and
often I wait for 5 minutes and the message goes away, but the email doesn't
load.  This didn't happen previously, and yet I haven't changed my computer
configuration at all.