I am pretty sure Aaron said something along the lines that augmentations = cyberware and bioware, but i can't seem to find the reference right now....

If this is the case. And if increase to reaction and increase to initiative dice don't count as increase to initiative. Then improved reflexes would be compatible with wired reflexes (and
every other drug, cyberware, bioware, spell or adept power except increase reflexes since increase reflexes is the
only enhancement that directly increase initiative
attribute) and Wired Reflexes would be compatible with improved reflexes (and all other magical and drug enhancements etc. that are not cyberware or bioware; that does not count as augmentations).
Putting the augmentation definition and wired reflexes augmentation aside; the final initiative score increase you get from having improved Reflexes would be compatible with the final initiative score increase that would result from having Adrenaline Boost, Increase Intuition, Improved Physical Attribute [Reaction], Adrenaline Pump, Suprathyroid gland, Cram, Jazz, Novacoke, increase reaction, psych (and possible wired reflexes ... depending on if augmentation mean only cyberware + bioware; or not). This will potentially lead to increased final initiative scores....
With a reading that "increases to initiative" would include indirect and direct increases to attribute, dice and score... then improved reflexes will be incompatible with all technological and magical increases that affect initiative in any way for the purpose of calculating the final initiative score. improved reflexes would basically only be compatible with drugs (when it comes to calculating the final initiative score).
I might very well be wrong, but am I really the only one that find it more than a bit strange that for example improved reflexes, wired reflexes, adrenaline boost or synaptic boosters would
not count as increases to initiative...??