If you spend 10 hours/day on your Windows machine, it is likely you are doing some pretty heavy work, and it is likely you've learned a lot of Windows shortcuts and shortcuts and routines related to the particular applications you are using.And I spend all day on my laptop...literally. I am online probably 10 hours a day or more. A lot of programs I run, are PC only.
So...
Like me, it's likely your OS X learning curve will be steeper than everybody is saying.
Let me tell you, though, that after I took the first step and started learning things, I was thoroughly convinced and jumped in the deep end. I thought I wouldn't be able to get along without some Windows applications, but the *only* reason it turns out that I absolutely need Bootcamp on one machine is because on rare occasions I have to use an ancient terminal application to connect directly to machines that have lost their regular connectivity and I have to dial into their backup-backup-last ditch analogue modems and get them going again.
I thought I wouldn't be able to do without Office, but it wasn't that hard to learn to configure iWork to do what I wanted, and in combination with Adobe's relatively excellent support of OS X, I haven't even needed to use any Office application. Most of us were addicted to Outlook, but when you see the instant integration of MobileMe and the Mail and iCal applications, you realise after a few days that you do not even need Outlook.
You might also be entertained to know that although there's no denying that Windows is still the US government standard, you'll find more and more people, agencies and departments switching to OS X wherever they are allowed to do it.
I'm pretty old. I think that if I can get used to it, you will be able to get used to it!