My comment would be:

I think nowadays people are using "gitsem" in a different way, but if I was asked to translate;

If I were to come, would you meet me?

I would have translated it as;

Gelecek olsam, benimle .....

Likewise... if you were to ask me.. bana soracak olursan....

Bu tif I were to translate these into English:

Gelsem, benimle buluþsur musun?

If I come, will you meet me?

Bana sorsan... If you ask me..

So I think there is a difference, but it is just that less people are using the proper form, and this started sounding okay.

it seems like relationship between chicken and egg. I think all explains true but best explain has belonged to Yýlgun7.

 I don´t agree with you that it is a chicken egg situation here.. It is actually quite simple:

verb root + -se/-sa + tense  mostly implies wish

I wish he would come early today - Keþke bugün erken gelse.

I wish he listened to me - Keþke beni dinleseydi.

Only if she has listened to me - Beni bir dinleseymiþ

If he were to listen to me - Beni dinleyecek olsaydý..

verb root + tense + -se/sa always is a conditional, sometimes wish form is also used as a conditional:

If I come early, we can go to cinema - Eðer erken gelirsem, sinemaya gidebiliriz.

If you will not listen to me, I will stop talking... Eðer beni dinlemeyeceksen, konuþmayý býrakacaðým.

If you came early, we could have gone to cinema - Eðer erken gelseydin, sinemaya giderdik.

If he came early, it is all because I let him go - Eðer erken geldiyse, sadece ben izin verdiðim için.

If you have listened to me at that time, you wouldn´t have been in trouble now.. o zaman beni dinleseydin, þimdi sýkýntýda olmayacaktýn.

If he has listened to us, he will never speak to me again.. (Eðer) bizi dinlemiþse / dediklerimizi duymuþsa, bir daha benimle hiç konuþmaz. 

I hope I haven´t confused you.

Some of the confusion may come from trying to compare Turkish and English. My understanding is that -sa and -say are Conditional Markers and not actually verb tenses; that is, they indicate a conditional (or wish)  tone to the sentence instead of a specific tense or time event. That is why examples given in the forum are from a range of tenses. 

Anyway, for those of you who can´t get enough of the linguistic details, you may want to check out the following link in Google Book Search

http://books.google.com/books?id=ChbBlU9VtIwC&pg=PA419&lpg=PA419&dq=conditional+in+turkish&source=bl&ots=uOJjWRD2Si&sig=rmswBuyw3ErEzBMfKu3mxLhSqlo&hl=en&sa=X&oi=book_result&resnum=4&ct=result