The only time i have ever held up a client was when I came down with pneumonia and I sorted it out with my now steady client.
I didnt bullshit them and told them it would take a week or more to start a load of galleries... Got them in when i said...
ill never bullshit a client. I like to give them an over shot estimate anyway...both to gie me possible home dilema time and early work makes happy clients
edit* oh dont forget
http://www.lumpyimages.com