This post is spot on. While building http://keeprecruiting.com we did not obsess over IE. This wasn't planned or anything but we really did not have the time. We ensured that it displays alright and does not break the functionality but we did not bother to make it look pixel perfect. We have built this product for recruiters who are notoriously uninformed about technology. We were helping one of our beta customers and one of the forms in the app was misaligned in IE6. We do not support IE6 but it was the only browser accesible to her at that time (new WinXP image). She immediately closed the browser double clicked on IE again and googled for chrome. This is one of the typical recruiters who does not understand about computers but somebody has told her that if a site looks bad in IE open it in chrome. The machine did not have Chrome so she went ahead and downloaded it after briefly cursing the IT that they do not install Chrome by default and that she had to get it on to her machine.
This is probably because google has started advertising big scale in India[1] as a part of the "Install Speed" campaign. Given the unbearably slow internet lines in India, highlighting "speed" as one of the features is a clever way to market it.
[1]: https://encrypted.google.com/search?hl=en&safe=active...
So for a bootstrapped startup, spending the time on getting the product right is more important than making it look good in IE. In fact, most customers don't care. They will simply move on to a different browser. You can spend the time providing them the features they need. Everybody wins.