I would be careful in that everything can be attached to an earlier teaching but that does not mean that it came from that teaching. If you read a Christian writer of any era on being content in one's circumstances I will guarantee you can tie it directly to Stoicism, for instance. That is why Edwards thought so highly of that system. That's just one example. Augustine was influenced by Manicheism and maybe reverted back to it later in life. I have read Ken Wilson's book on it too. That's why I like Spurgeon above, and Edwards and Owen, who take the time to take us through the exact things involved in bringing one to salvation. If you have time read Owen on the work of the Holy Spirit. You might be surprised to find that he leaves some room for human free will and has a lot to say about the complicated interactions that occur between the sovereign work of the Holy Spirit and our free will, both in a natural state and when acted upon by the Holy Spirit.
As Spurgeon shows above, at the point of actual salvation, the systems are the same. The argument is over how we get there. The sermon above that Martin put up an excerpt from also talks about how highly he thinks of Wesley, and also how the idea of a free and actual offer, and God's true desire for the salvation of all men does indeed accompany God's right to act in a sovereign way in our salvation.
If you believe that God has no right or if you limit his activity toward us to putting out the gospel in the form of the informational proposals and then man is left to evaluate and decide whether to believe you are definitely at one end of the spectrum. But if you believe, like some on this forum do, that God has already decided everything and has already justified the elect, and has nothing to say at all to the rest of humanity, then you are at the other end of the spectrum and are not at all close to even most Calvinists. Spurgeon mentions in his sermon (which is available on the archive website) that as men we have to keep God's sovereignty and man's responsibility in mind at the same time, which may be impossible for our human minds to achieve to our satisfaction.
One of the most powerful arguments for some level of Calvinistic theology is to just ask yourself this. If you have someone you really care about, who is not a believer, but has indeed heard the gospel, do you ever pray for them? If you do, what exactly are you asking God to do to them?