madazz demonstrates a good point even though he's obviously off base regarding your desired knowledge..
The terminology out there is pretty dang wishy-washy even among the scientific community.. Basically depending what you're reading, both may be the case..
Personally I like the terminolgy where an F2 cross is a cross between 2 heterozygous F1's from the same parent stock.. This would clearly denote an F2 as untampered, 75%Dom phenotyped sibling stock..
Its worth noting though, that assuming homzygous true breeding parents, back-crossing at this point would not alter the expected phenotypes, only their frequency (which tell you whether that parent is hymozyous dominant or recessive for that trait).. Anything producing some seeds expressing recessive phenotype will prove that the parent was recessive, and in an idealized situation will be homozygous recessive itself, and any dominant phenos will still carry unknown genotype..
AAxAa > AA Aa (100% pheno occurance in backcrossing discovers P1 to be dominant)
aaxAa > Aa aa Aa aa (50% in backcrossing reveals P1 recessive)
AaxAa > AA Aa Aa aa (75% in F1 crossing)
So it doesn't really make a difference since prior to the time they're grown out, the genotype could not be known either way, and after this point you'll know whether they were for all intents and purposes the same as true F2's (F2's and [r]B1's) or backcrossed to the dominant parent ([d]B1's)..