Ok so after I read some stuff on
http://homedistiller.org/methanol.htm I found that methanol is in extremely low quantities in spirits:
"How dangerous are the various fusel oils ? I've got some of them listed below.
The ones with toxicity data listed are ...
* Methanol : usual fatal dose 100-250 mL
* 1-Pentanol : LD50 (rat) 3030 mg/kg
* 3-Pentanol : LD50 (rat) 1870 mg/kg
Compare this to the amounts present in distilled spirits. The data in Wheeler & Willmotts "Spirits unlimited - a complete guide to home distilling" gives :
* Home distilled spirit (untreated): methanol 0.0067%, ethanol 99.632%, fusils 0.361%
* Commercial vodka: methanol 0.013%, ethanol 99.507%, fusils 0.48%
* Poor quality home distilled spirit : methanol 0.0186%, ethanol 98.453%, and fusils 1.528%
If you're talking about untreated spirits as being dangerous, then to reach the LD50's that are published, you'd need to consume 149 L to be affected by the methanol, or for a 90kg bloke, about 58 L for the pentanol, from the "good" homemade stuff. That would be one hell of a session ! Even on their "poor quality" brew you'd need 11 L for the fusels. Stock standard pissed-as-a-newt high-school-student alcohol poisoning is the greater problem."
And as for the pectin issue:
"The methanol comes from the pectin, which mainly composed of methyl esters of galactose. When pectin breaks down, by enzymes introduced by microorganisms, or deliberately introduced, the methyl esters combine with water to produce methanol, so the aim should be to leave the pectin well alone if you can.
I think Jack would agree that what he means is that fermenting at a high temperature, or adding pectin enzyme, or trying for an abv higher than 12% all increase the risk of methanol being produced, so his advice about low temperature fermentation, adding no exra enzymes, and a target lower than 12%abv is all good stuff."
So in the end I also agree that freeze concentration is't all that bad, I mean if you concentrate a 10% cider to 30% ABV one glass of applejack would contain the same methanol as 3 glasses of cider and 2 glasses of applejack would be the same as 5-6 glasses of cider so about a quart,would a quart a cider give you methanol poisoning, most certainly not, would you drink more than 2 big wine glasses of 30% ABV applejack, well if you do you'll get realy drunk and pass out
Heat distillation with a still on the other hand is far more dangerous and highly illegal, moonshiners beware