Murtaza,
In addition to Scott's post...it depends upon you too (the candidate). If you are someone who wants to dive in the deep end of the learning pool, ready to take the pressure...not fazed by discomfort, someone who can get information by reading, surfing, trying out on his/her own. Then implementation is the way forward. You might give full 2, 3 years of your life (no social life, working till late night...all encompassing) but the learning will be rock solid and fast (faster than in support)
TW