Dynamic light scattering data are interpreted to obtain the longest intramolecular relaxation time, τ1 and the relative amplitude of the scattering from intramolecular and center of mass translational diffusive decay modes, Po/P, for a polystyrene (PS) of high molecular weight Mw=8.42×106, in two good solvent systems, ethylbenzene (ETBZ) and tetrahydrofuran (THF) at 25°C. Comparison of τ1 data with the Rouse-Zimm theory, τ1=M[η]ηs/A1RT, indicates differences in the value of the draining parameter A1 between these two solvent systems. In addition, the relative scattering amplitude of the diffusive scattering for a single coil, (Po/P)c=o, decreases more rapidly with qRg for PS in THF. Thus the scattering amplitude of the intramolecular normal modes of motion of PS in THF, for a specified value of qRg are substantially larger than those for PS in ETBZ and the other aromatic good solvents. These observations are each qualitatively consistent with a larger solvent draining effect in ETBZ versus THF. Comparison with literature data for chains in good and theta solvents suggests that the quantity (Po/P)c=o may be a universal function of qRh.