When and Where Does "Excellence" Meet "Shipping"?

I'm confused to how to reconcile these two ideas; and I'd love your help trying to think this out. Tom Peters, the famed author, speaker and consultant stresses striving "Excellence. Always. If Not Excellence, What? If Not Excellence Now, When?" (The Little Big Things - latest book)

Seth Godin on the other hand, another famed author, thought leader and marketer, stresses "shipping"; getting the product out the door to defeat the "resistance" and fears we all have ranging from failing to being judged. In a blog post regarding his most recent book (Linchpin) he states,

"Ship often. Ship lousy stuff, but ship. Ship constantly. 

 Skip meetings. Often. Skip them with impunity. Ship."

One point that he makes repeatedly, often times using himself as an example, is that the most successful individuals are those that ship the most because going by the numbers, they have a greater likelihood of putting a "great" product/company/service out. 

As a passionate follower and supporter of each, I'd love to just listen to both and take their word for it, BUT, these two trains of thought seem to be in conflict with each other. How can an individual/company/organization "achieve excellence" if they are shipping a 1/2 baked product that they may o making changes to or enhancing? 

Shipping bad/average/good products that aren't excellent yet is really in contrast with "If Not Excellence Now, When?". And while I don't believe delaying and thrashing at product with the goal in mind of achieving excellence is what Tom Peter's is stressing, it seems like those things would have to be part of the process in trying to best produce product X. 

How do you resolve this? Can you ship "excellent" products constantly?

Let me give you something to think about. I enjoy blogging a lot because I get to voice my thoughts, ideas and observations to an audience (albeit small). I also get to connect with a lot of interesting individuals through this blog and twitter (@ryandawidjan). 

But, I often times don't achieve excellence in regards to every blog post. I focus on shipping my thoughts and ideas for two reasons: writers only get better by writing more and if I delayed writing these spontaneous ideas, they would never manifest themselves. So this means I don't spend hours re-drafting each blog post like I feel Tom Peters would.

I'm torn because at the same time "It's Always Showtime". A faculty member, friend or potential boss could swing by the blog and see a mediocre post and unfortunately that becomes their first impression of who I am and what I'm about.

What do you think? Would love to hear your thoughts...