Yep, it helps. But only a little.
http://appleinsider.com/articles/15/10/15/only-5-of-mac-users-at-ibm-need-help-desk-support-compared-to-40-of-pc-users
According to IBM who are busy switching many users from PC's to Mac's, the difference in tech support requirements is staggering.
While 40% of PC users will contact tech support, only 5% of Mac users will.
For a company, having to employ, train and supply gear for tech support can be very expensive, even without adding the cost of end user down time while the problem is fixed.
Given the low rates of support needed, training yourself for Mac's will be a very low priority.
Every time i've called Apple, i get through within a 1-3 minutes, speak to an Australian, not an Indian, and they are never bothered about exceeding the 90 day support. They normally don't mind if it's out of warranty either. All this works against you.
You'd have more luck getting into the hardware side of things.
Bigger hard drives, upgrade to SSD, SSD and HDD combo, ram (even though it's stupidly easy most of the time).